Tag: ReefKeeping

SPS corals were a turning point in my reef journey — the moment I started keeping them successfully, I knew I’d reached a new level as a hobbyist. They demand stable parameters and consistent care, but the payoff is a reef that looks genuinely spectacular. If you’re thinking about making the jump from softies and LPS, this guide will help you understand what you’re getting into.

Small polyp stony (SPS) corals are the end goal for many reef hobbyists. In the wild, these corals, like the impressive staghorn coral, define marine ecosystems and house a plethora of life on the reef. In the aquarium, they can bring the same color and depth to the tops of rockwork that other large polyp stony (LPS) corals and soft corals cannot.

However, SPS corals are regarded as the most challenging species of coral to keep in the home aquarium setting. While it is true that they are more difficult than other types of common coral, they are not completely out of reach for more serious hobbyists.

What Is The Difference Between Other Corals?

SPS corals are easy to identify. They completely lack the fleshy, large colony quality that LPS and soft corals have. Instead, SPS corals have a hard branched or plated appearance with individual polyps.

In the reef aquarium hobby, SPS are considered to be the most difficult species to keep, with LPS being for intermediate hobbyists, and soft corals being best for beginners. Apart from this, all three have very different anatomy and physiology.

SPS corals, also known as hard corals, are responsible for building the natural reef. These animals excrete calcium carbonate skeletons that make structures for fish and invertebrates to find shelter; symbiotic zooxanthellae are also housed in these skeletons and complete photosynthesis which feeds the coral.

Taxonomically, SPS corals belong to the Scleractinia order¹. From there, they are members of the Hexocorallia subclass which means that their polyp symmetry is divisible by six. Such as they are named, they have very small polyps on the outside of their flesh-covered calcium carbonate skeleton.

The calcium carbonate skeleton of SPS corals is built to withstand the battering from rough waves at the top of the reef where these corals are found. This also allows them to receive the most direct sunlight as their branches can grow for optimal exposure. This translates to a reef tank setting with the need for higher lighting and increased water flow.

Soft and LPS Corals

On the other hand, soft corals and LPS can be entirely fleshy, have a calcium carbonate skeleton, or contain sclerites, meaning they contain small pieces of hard internal structure; the main feature of soft corals and LPS corals though, is their very obvious polyps which can extend to impressive sizes.

Some LPS corals do have a calcium carbonate skeleton, however, the polyps extend outwards and don’t cover all parts of the structure such as they do for SPS. Some soft corals may contain sclerites but are much less structured than LPS overall.

Both LPS and soft corals are found lower down on the reef where the water current is not as strong and lighting is indirect. This translates into the aquarium with low to moderate lighting and moderate flow requirements for most species within these two categories.

Keeping Them In The Aquarium

SPS corals are notoriously known for being difficult to keep. But are they actually that much more demanding than other corals? Yes and no.

Yes, SPS corals are much more demanding than soft corals and LPS corals, but this doesn’t necessarily mean that they’re all more difficult. The main difference is the setup and the maintenance: SPS corals need a high-tech setup and stable conditions while LPS corals and soft corals can adapt to less optimal conditions.

A high-tech setup starts with good lighting, water flow, and filtration. SPS corals are some of the most light-demanding corals, and a good light fixture is necessary. This light needs to have a fully programmable spectrum, intensities, and photoperiod at the very least. The EcoTech Radion is a great example of an LED designed for the demands of an SPS tank.

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Water flow is almost, if not more, important than lighting. Water circulation keeps corals fed and prevents algae from taking over. Many SPS corals grow in tight colonies, which can cause dead zones in the densest parts. Water flow needs to be random in order to keep fresh water pushing past all areas of the colony at all times.

Though some reef aquarium hobbyists run SPS-dominant reefs with simple filtration, it is usually also a must to have a sump system. Sumps allow for additional room for beneficial bacteria to grow, increased nutrient export, and adequate aeration. All of these factors play into a more stable system overall.

Stability is arguably the most difficult part of keeping SPS. These corals are notorious for bleaching and eventually dying when conditions change too quickly. All major water parameters, along with alkalinity, calcium, magnesium, pH, salinity, and temperature all need to be constant for success.

Many hobbyists regulate these parameters with digital monitors, auto top-offs, and doser pumps, even Calcium reactors for full high end systems. These all get get very expensive over time. However, if you’re willing to spend the money upfront for a top-of-the-line SPS system, then there is a good chance that you will succeed in keeping these corals. Of course, you may do everything right but still have problems.

Water Parameters

That being said, what are the perfect water parameters for an SPS reef tank?

As always, these values can differ between tanks and hobbyists have had luck below and above the listed ranges; if your water parameters and tank conditions do not match these but your corals are healthy, do not attempt to change your system just to meet ‘ideal’ numbers.

In general, though, these are the accepted ranges for keeping SPS corals:

• Lighting – High (200+ PAR)
• Flow Rate – High
• Temperature Range – 76-82 F
• pH Range – 8.0-8.4
• Salinity – 1.025 and 35 PPT 
• Alkalinity – 8 dKH
• Calcium Level – 350-450 PPM
• Magnesium Level – 1200-1350 in PPM

Note that many hobbyists keep SPS corals in lighting conditions well over 200 PAR, though this is considered to be the bare minimum for attempting them at all.

Temperament In The Aquarium

One of the good things about SPS is that they are not very aggressive corals. This allows multiple species to be housed very closely together without too many problems; this does not mean that they will not try to sting each other though, so it is always best to be cautious and to trim any corals that grow too close together.

The main problem with SPS aggression is with other corals. LPS corals with long sweeper tentacles are very capable of stinging sessile SPS, which can quickly cause tissue loss and other damage. To prevent this, simply keep LPS away from SPS, possibly at another level of the tank.

Though SPS is usually able to regrow once the problem has been addressed, this still gives time for algae to takeover exposed skeleton which can impact the overall health of the coral.

Common Types (Different Species)

SPS corals make up the ‘ideal reef’ that many envision when they think about a coral reef in the ocean; SPS are branching corals that give reefs their signature appearance. However, different species of SPS corals can be difficult to tell apart to the untrained eye. This could be due to a few reasons.

One, SPS are usually sold as small frags, which can make exact identification nearly impossible with such a small sample. Secondly, species of SPS can vary greatly in color and shape across the genus; as we’ll see, Montipora especially can come in several formations.

It should also be said that SPS-keeping is another level of the aquarium hobby. You will often come across corals that you have never seen before and might never see again. In general, it is best to know the general attributes of each major SPS genus and try to apply them to what you see.

Montipora

Montipora Cap Coral

The Monti Cap coral is a good stepping stone to serious SPS reefkeeping. Becomes large and grows very fast

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• Scientific Name: Montipora spp.
• Difficulty Level: Easy-Moderate
• Temperament: Not aggressive
• PAR Requirements: Moderate (150 PAR)
• Flow Requirements: Moderate-High
• Placement: Middle, High
• Origin: Indo-Pacific

Montipora is a genus of SPS corals with very diverse members. These corals can come in branching, plating, and encrusting varieties in almost all colors. They are not overly demanding in regards to being an SPS coral, but they do require high lighting, good flow, and stable water parameters just as the other, more advanced corals on this list do.

The most common types of Montipora to come across are Montipora digitata and plating Montipora.

Montipora Varieties

Montipora digitata is a branching variety of Montipora. The two most common colors are orange (‘Forest Fire Montipora digitata‘) and green (‘Green Montipora digitata‘); these corals have been modified to express the best colors and may be assigned a designer name.

Montipora digitata have thicker branches that sometimes grow together to form antler-like structures. Their polyps are very concentrated and have a soft appearance. The tips of these branches will typically be bare and white where new skeleton growth is forming.

In comparison, plating varieties, like Green Montipora digitata, grow outwards in large circular disks. Similarly, the tips of these plates will be white with new growth.

All varieties of Montipora can be attractive to most hobbyists as they’re one of the easiest and fastest species of SPS to keep.

Pocilloporidae Family

• Scientific Name: Pocillopora spp., Seriatopora spp., and Stylophora spp.
• Difficulty Level: Easy-Moderate
• Temperament: Not aggressive
• PAR Requirements: Moderate (200+ PAR)
• Flow Requirements: High
• Placement: Middle, High
• Origin: Indo-Pacific

Members of the Pocilloporidae family are largely known as bird’s nest corals due to their interweaving branching growth. They come in many colors and are said to be even easier to keep than Montipora, but still require SPS growing conditions.

There are three genera of bird’s nest coral commonly found in the aquarium hobby: Pocillopora, Seriatopora, and Stylophora.

Pocillopora

Pocillopora Coral

The Pocillopora is a great first time SPS coral that is forgiving on parameters. Peaceful and a moderate grower

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Pocillopora have thick, stubby branches. They have a moderately fuzzy appearance and are most commonly found in greens and purples.

Due to their thick branching, these corals do best with higher rates of water flow.

Stylophora

Stylophora are very similar to Pocillopora. In fact, it is usually only possible to tell these two corals apart by looking at a full colony.

Stylophora also have rounded branches with moderately fuzzy polyps. However, the overall appearance of the colony tends to be more orderly and uniform than that of Pocillopora.

Seriatopora

Seriatopora are largely known as the true bird’s nest corals of this family as they have pointed tips and very thin branches that create an intricate twig-like cluster of coral. These corals are also most commonly found in pinks, greens, and purple and green combinations; their polyps are much more spread apart than the other related corals.

Seriatopora are very delicate and need to be handled with care. This can make fragging them very easy but can also make transportation quite difficult for larger colonies.

Acropora

Acropora Coral

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The Acropora Coral is considered the pinnacle coral to keep in reef tank hobby. Difficult to care for, but extremely rewarding and easy to frag

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• Scientific Name: Acropora spp.
• Difficulty Level: Hard
• Temperament: Not aggressive
• PAR Requirements: Moderate (200+ PAR)
• Flow Requirements: High
• Placement: Middle, High
• Origin: Indo-Pacific with some species in the Caribbean

Acropora are the end goal of many intermediate and advanced reefers. These corals are seen as some of the most difficult, yet most rewarding species in all of the hobby. There are many types of Acropora to choose from that come in nearly all colors, including more exclusive designer names.

Even though there are many different kinds of Acropora, they are still relatively easy to identify. These corals branch and have very identifiable polyps; each polyp has its own little tube that gives the coral a bumpy appearance. The actual polyps can be long and stringy or short and flat.

Acropora are considered the most difficult because they are easily affected by changes in water parameters. They also demand the most light and water flow out of all these species.

Closing Thoughts

SPS corals are thought to be some of the hardest, yet some of the most rewarding species of coral available in the aquarium hobby. Though this is true, their actual requirements aren’t as challenging as you might think. Instead, it’s their need for stability and consistency that can make their care extra difficult.

Luckily, there are a few easier species, like Montipora spp. and members from the Pocilloporidae family, that can make the transition from LPS corals and soft corals to Acropora a little less intimidating.

📘 Want to learn more? This article is part of our complete Saltwater Fish & Reef Guide — your ultimate resource for marine fish, coral care, reef setup, and more.

Aiptasia is one of the most frustrating reef pests I’ve dealt with in my 125-gallon reef tank. These pest anemones showed up hitching a ride on live rock, and before I knew it they were spreading to my corals. I’ve personally tested most of the removal methods out there — from Aiptasia-X to peppermint shrimp to berghia nudibranch — and I can tell you firsthand what actually works and what doesn’t. This guide covers everything I’ve learned over 25 years of keeping reef tanks about controlling and eliminating Aiptasia for good.

Hobbyists have been fighting the battle against Aiptasia for decades, and luckily, several solutions have been found to eradicate Aiptasia once and for all.

What are Aiptaisa Anemones?

When setting up a new saltwater tank, it can be very exciting to find any signs of unexpected life during the nitrogen cycle and shortly after. Copepods start to show up on the glass and even algae can be an amazing discovery. Until suddenly, you find a small, clear what-seems-to-be coral.

These ‘corals’ have long and thin tapered tentacles and might even resemble a kind of zoanthid at first. Usually, these tentacles will be attached to an oral disc that emerges from a long, translucent stalk. Sadly, more often than not, this unidentified polyp is actually a kind of pest anemone belonging to the Aiptasia genus.

The main problem with Aiptasia Anemones is that they are both sexual and asexual; they can quickly split to create exponentially more anemones in a very small period of time. Like other species of anemone, they have stinging cells that can cause damage to nearby coral, fish, and invertebrates.

They can also grow in very hard-to-reach places in the tank where you might not even see the problem forming. Their tentacles will grow in order to reach light, though their stalks may elongate and emerge from dark crevices within the rockwork.

Naming And Other Pest Anemones

In general, all species within the Aiptasia genus are simply referred to as Aiptasia even though there are several other known members; other common names include glass anemone and rock anemone (not to be confused with rock flower anemones of the Phymathidae family).

Another type of pest anemone, Majano anemones (Anemonia manjano), may also be clumped together when talking about Aiptasia hitchhikers.

Majano anemones are said to be easier to remove than Aiptasia, but they will both cause a headache at the end of the day. Majano anemones are, in some ways, prettier than Aiptasia and have rounded green tentacles with a purplish-pink oral disc; they are typically larger, have much more opaque flesh, and overall more vibrant colors than Aiptasia.

Like Aiptasia, Majano anemones can quickly take over a tank and injure other corals and tankmates. Luckily, most of the removal methods are universal for pest anemones.

How Do They Enter The Aquarium?

Aiptasia Anemones are present in most aquarium systems. They can be very difficult to notice in dense rockwork and before you know it, you have a tank overrun by them. But how did they get there in the first place?

These anemones are hitchhikers, just like any other algae or invertebrate that unintentionally enters the aquarium. This means that they can come in on live rock, corals, or even filter media. Once established in the tank, they can then spread to every part of it, including the filtration system and sump.

In general, it’s not considered as an if these anemones will enter your system but a when.

How Do You Prevent Them From Entering The Aquarium?

Though Aiptasia Anemones will find its way into the aquarium if it wants to, there are some ways to protect your system.

Mainly, observation and preparation are key.

Observation And Identification

It might sound simple, but observation is the best way to find and destroy Aiptasia before they get the chance to destroy your reef tank.

Check and double-check new additions of live rock and coral. Use a flashlight to look in the crevices for any signs of tentacles popping up through the rockwork. Continue to check your tank daily for the next few weeks after a new addition.

It is easiest to find pest anemones when they are extended in the water instead of when they are emersed. If possible, observe live rock and corals from a quarantine system. From there, use one of the following methods to remove it.

One of the biggest mistakes beginners make is that they think an Aiptasia is a desirable coral and let it continue to grow. It is important to accurately identify the anemone first in order to go about fixing the problem. More often than not, any ‘lucky’ coral you see on new rock or a coral plug is actually an Aiptasia.

Quarantine

That being said, all new live rock and coral should be quarantined. No exceptions.

Not only does quarantine help prevent disease and illness from entering the aquarium, but it also greatly reduces the risk of inadvertently introducing Aiptasia Anemones as well.

Allowing two or more weeks of secluded observation will allow most hitchhikers to rear their ugly heads. It is much easier to fix these problems in a controlled setting than having to break down the rockwork and possibly filtration once put into a display. It also means that you can be more vigorous and widespread with treatments, such as chemical solutions.

Remove Frag Plugs

When buying new corals, they will often come on a frag plug. No matter if these corals were aqua-cultured in a controlled environment or gifted by a trusted fellow hobbyist, this frag plug should always be removed.

For one reason or another, frag plugs are notorious for carrying in unwanted hitchhikers. Aiptasia are very quick to occupy free real estate and a frag plug is no exception. Most often, these anemones are very tiny and might only be able to be seen under a magnifying glass.

When in doubt, throw it out.

Source Rock

Another way Aiptasia Anemones travels across tanks is by live rock and filter media. Many times, hobbyists share these with each other in order to seed a new tank with beneficial bacteria. Though this usually works flawlessly, there is always the chance that you’re introducing Aiptasia into the system.

If you’re really worried about introducing pest anemones via live rock or filter media, do not use what has been in another tank. Instead, use brand new dry rock and cycle the tank with another method. This way, there is no chance of having any pests come in.

The downside to this method is that many of the beneficial hitchhikers are lost as well, like copepods, and will need to be manually introduced later.

How To Get Rid of Them From Your Aquarium (The Best Ways

The key to dealing with an Aiptasia outbreak in your aquarium is acting quickly and effectively as soon as you see one appear. The longer you wait to take action, the more chance they have to grow and spread throughout the reef tank.

There are a few different methods based on the size, type, and amount of pest anemones in your saltwater tank. Whether the method works for you will also depend on several factors and Aiptasia removal could become a regular part of maintenance.

Here are the best ways to get rid of Aiptasia Anemones from your saltwater aquarium.

Manual Clean-Up

Manual removal is one of the easiest methods, but also the least guaranteed way to fully remove Aiptasia from the aquarium. This is because these anemones are capable of growing from the smallest piece of flesh leftover, and it can be very easy to miss; in fact, Aiptasia only need a single remaining cell to regenerate into a new animal.

For manual removal, you will need to be able to take the piece of rock out of the tank. Once removed, use scissors, razors, bone cutters, and whatever else you need to in order to get every last piece of anemone off of the rock. Some hobbyists split the rock in half entirely to ensure that there is no chance of the anemone coming back.

Still, it is easy to miss other smaller Aiptasia that might have already propagated or left remnants behind.

Super Glue (Cyanoacrylate)

Super glue is one of the easiest and least damaging ways to control Aiptasia Anemones, though this method does not work all of the time.

This method simply involves coating the anemone in a thick sarcophagus of superglue so that it is unable to extend. Simply remove the affected piece of rock from the aquarium and apply a healthy dollop of glue.

There are a few problems with this method, though. First, it’s not always feasible to remove the piece of rock from the reef tank. Second, the anemone is very capable of growing around the glue and out through another opening, allowing it to live; some hobbyists have even seen them come out from the other side of the rock if the opportunity presents itself.

Super glue is most effective for removable pieces of rock and small Aiptasia that can be generously coated and sealed.

Chemical Products

There are many chemical solutions on the aquarium market designed to eliminate Aiptasia from the aquarium. This method can be very effective when facing large colonies of pest anemone with sizable individuals.

Kills Aiptasia

Aiptasia-X

A great solution for target elimination of Aiptasia in a reef tank.

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One of the most popular Aiptasia removal chemicals is Aiptasia-X by Red Sea. This product needs to be applied to the surface of the oral disc of the anemone, where it is then forced to be ingested. Within a few minutes, the anemone implodes on itself, preventing regrowth and larvae from spreading throughout the rest of the reef aquarium.

Other popular brands include:

• Joe’s Juice Aiptasia Eliminator
• Salifert Aiptasia
• Blue Life Aiptasia Rx
• Reef Kalkwasser (calcium hydroxide). Though not a product specifically meant for Aiptaisa, Reef Kalkwasser can be used to create a paste that can cover the disc of the anemone in a similar fashion.

These chemicals are not effective for all reefers though, and these products can actually harm healthy corals if not applied correctly. The application can also become difficult if the anemone is situated in a hard-to-reach spot where it has time to react and retract. If only a small dosage is received, then the Aiptasia may come back stronger and start to propagate.

Other DIY Solutions

If you don’t have immediate access to chemical solutions, then you might need to make your own solution. It should be noted that these methods are very prone to failure and should only be done under close moderation.

1. Lemon juice. Lemon juice has been used to successfully remove Aiptasia Anemones. Fill a syringe with lemon juice and inject it into the anemone. The acidity will theoretically cause the anemone to die.
2. Vinegar. Similarly, vinegar can be injected and will kill Aiptasia due to its acidity.
3. Hydrogen peroxide. Hydrogen peroxide is not likely to work when only applied over the anemone. Instead, it can be used to wipe off the remaining parts of Aiptasia that are leftover from previous attempts of removal.
4. Boiling water. Boiling water can be mixed with lemon juice or vinegar or used by itself. Again, use a syringe to inject it into the anemone.

These methods have worked for some hobbyists and completely failed for others. It is necessary to gauge how much solution is entering the system as both lemon juice and vinegar can start to affect pH due to their acidity. Boiling water can also burn nearby fish and invertebrates.

If able to do so, attempt other methods first as to not encourage propagation from a failed removal.

Lasers

Lasers are an expensive solution but can be very effective at reaching hard-to-reach places without having to put your hands in the reef tank. They are a relatively new technology being introduced into the reef aquarium hobby for treating Aiptasia Anemones and come with mixed results that might not make their price worth it.

These lasers need to be very strong and capable of melting away Aiptasia anemone. The problem with this is that they are also very capable of injuring other corals, fish, and invertebrates in the process.

Some hobbyists have reported them as being completely ineffective.

Livestock (Fish And Inverts That Love Eating This Type)

Adding Aiptasia-eating fish and invertebrates to the tank system is usually a great alternative to the other methods mentioned. However, there is always a risk when adding something new to the tank.

The main problem with adding additional livestock into the reef aquarium is that many of the species recommended to add cannot discriminate between a coral and an anemone. As a result, they might start to target colonies of desired corals and leave the Aiptasia nice and healthy. It is also possible that your fish or invertebrate will successfully eat Aiptasia and then starts to eat corals, too.

Regardless, many hobbyists try their luck at adding a new fish or invertebrate species for dealing with Aiptasia problems; some can even arrange temporary housings until the anemones have been eliminated and then pass them along to another hobbyist.

Here are some of the most common fish and invertebrates species for removing Aiptasia from your saltwater aquarium.

Butterflyfish (Chaetodontidae family)

For the most part, nearly all common species of butterflyfish have been used to effectively control Aiptasia populations. It is known that butterflyfish are not considered reef-safe and it should not come as a surprise if the one you add decides to go after corals.

There are, however, a few species that seem to be more reliable than others. This includes:

• Copperband butterflyfish (Chelmon rostratus)
• Klein’s butterfly (Chaetodon kleinii)
• Pearlscale butterfly (Chaetodon xanthurus)
• Raccoon butterfly (Chaetodon lunula)

Of course, always ensure that your setup is appropriate for the species you plan on adding. Tank size, water parameters, and diet should all be arranged to accommodate a new fish.

Eating Filefish (Monacanthidae family)

Aiptasia Eating Filefish are another popular addition for dealing with Aiptasia, though they are just as likely to nip at corals. Some hobbyists have found that buying captive-bred individuals helps deter coral picking and encourages Aiptasia Anemone hunting.

Aiptasia Eating Filefish aren’t the prettiest to have in a reef tank display and some species can get very large. However, the most popular Aiptasia-eating species, like the matted filefish (Acreichthys tomentosus), stay small and can quickly take care of a pest anemone problem.

It is not unheard of for filefish to suddenly start picking at corals, though.

Peppermint shrimp (Lysmata wurdemanni)

Great Against Aiptasia

Peppermint Shrimp

These little shrimp are the most common livestock treatment for Aiptasia. Available as tank raised and reef safe.

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A group of peppermint shrimp is usually the route most reefers take for dealing with pest anemones as they are small yet effective.

With multiple individuals, peppermint shrimp can be expensive and their high demand in the hobby can also make them more difficult to obtain. Not to mention that the peppermint shrimp has a very similar appearance to the camel shrimp (Rhynchocinetes durbanensis), which is not reef-safe, and can easily be confused.

Overall, peppermint shrimp have a very high success rate for dealing with Aiptasia, however, they’ll typically avoid larger ones. They have also been known to graze on zoanthids as well.

Berghia Nudibranch (Berghia stephanieae)

If you’re limited on space but still want a natural predator of Aiptasia, Berghia nudibranchs are a great short-term solution.

These nudibranchs can also be expensive and you will need a good amount of them depending on the size of your saltwater tank. Take into consideration that some fish and other invertebrates might also see them as food in the meantime just as they’re starting to hunt for anemones.

The main problem with Berghia nudibranchs is that they only eat Aiptasia. This is great in the short term when you are desperate to get rid of all visible anemones, but doesn’t serve as a very long-term solution; once your anemone supply runs out, these nudibranchs will perish.

Many hobbyists like to pass on their nudibranchs to other tanks suffering from Aiptasia so that they don’t die in the process. They can be very difficult to catch though, and often you will not be able to save them all. If you are interested in purchasing them, I recommend buying them from Salty Underground.

Closing Thoughts

Aiptasia are the last thing you want to see in your aquarium but are largely unavoidable. These ugly, fast-growing pest anemones can quickly take over a display and infiltrate filtration systems if left to grow.

There are many different methods for removing them, including chemical products, more organic solutions, and livestock recommendations. Whatever method you end up choosing, you will most likely need to also use other alternatives and keep on schedule for a few months until there are absolutely no signs of Aiptasia.

One of the best ways to prevent a pest anemone infestation is by prevention. Even then, it is good to be prepared if one ever happens to enter your system.

📘 Want to learn more? This article is part of our complete Saltwater Fish & Reef Guide — your ultimate resource for marine fish, coral care, reef setup, and more.

Green star polyps are one of the first corals I put in a new reef tank, and I still keep them in mine. They’re nearly bulletproof — fast growing, tolerant of a range of parameters, and they create incredible motion in the tank when their polyps are extended and swaying in the flow. If you’re new to reef keeping, GSP is an excellent starting point that will give you quick success and build your confidence.

When it comes to Green Star Polyp Care, there usually isn’t much to it. The main thing is learning how fast it grows, where to place it, and how to control it. It can grow quite large if given the right conditions and some reefers have event used them to create a wall of corals!

Today’s post is all about the Green Star Poly. Come find out all there is to know about this beautiful creature with our complete guide on how best to take care of your Green Star Polyp. You’ll be glad you did!

Species Overview

Origins And Habitat

Like many other corals, green star polyps come from the warm waters of the Indo-Pacific in turbid lagoons and along shallow to moderately deep reefs. There, they can be found alongside other soft corals, such as Xenia spp. and Clavularia spp..

Green star polyps are soft corals, meaning they do not have a calcium carbonate skeleton. Instead, they quickly grow as encrusting mats over rocks and other sessile objects.

Naming

In general, green star polyps are taxonomically categorized as Pachyclavularia violacea. This is a very broad name for these corals though, and it’s very likely that you have a species that is something other than Pachyclavularia violacea. The Pachyclavularia genus is also synonymous with Briareum and the two can be used interchangeably for this species.

Green star polyps are a type of soft coral (Alcyonacea order) though they contain sclerites, or small pieces of skeleton, within their tissue for structure.

What Do They Look Like?

When fully spread, green star polyps look like a lawn of grass. Individually, they have a white center and eight radial green tentacles. These serrated-like tentacles come out from a purple base with tubes for every polyp.

When closed, this coral looks like a pointy, purple mat. As we’ll discuss later, these corals can sometimes be temperamental and may be closed for extended periods of time if something is unfavorable in the tank.

Varieties

There are not many variations of green star polyp and their appearance largely depends on the type of aquarium light being used. Because they are so easy to grow, they are mostly aquacultured.

There are a few varieties of green star polyp though, mainly with differences between shades of green, tentacle length, and skeleton branching.

It is very common to come across ‘neon’ varieties of green star polyps where the tentacles are fluorescent green. Other variations might have a more defined white center or more tints of yellow, though the general purple and green coloration stays the same.

Some variations of green star polyp might also be long-tentacled. It is believed that long green star polyps are hardier and grow faster than shorter ones, which can sometimes be confused with galaxea corals (Galaxea fascicularis).

Within the aquarium, there is also said to be a branching variety of green star polyp. This variety is different from the regular encrusting type and is much more rare and desirable. The problem is that it can be very difficult to tell apart from others as there is little difference between small frags and usually no difference at all between namings.

Branching green star polyps grow outwards, away from the rock; this means that they don’t necessarily need to grow on top of rock to spread and can create archways and limbs that extend across the reef tank.

Still, green star polyps have not reached the brand-name-worthiness of other soft corals, which keeps their prices relatively low.

Galaxea spp.

To the untrained eye, green star polyps can look very similar to species of Galaxea coral. This can be a costly mistake as Galaxea have long sweeper tentacles that can severely damage other corals.

These two corals look very similar and even have similar care requirements. Overall though, green star polyps tend to be larger, less compact, and have more tapered tips. In a mat, galaxea corals can have a shaggy appearance whereas green star polyps will have a more uniform sway.

Green Star Polyp Care Guide

Green star polyps are one of the most versatile corals in the aquarium, meaning they can be placed almost anywhere. The problem is that they will also spread everywhere they can.

Green star polyps do best under moderate to high reef lighting with moderate to high flow; they can usually withstand conditions above and below this, though low light will result in slower or minimal growth and high light can cause bleaching and algae.

These corals need moderate to high flow in order to keep algae off their purple skeleton. Because green star polyps are so concentrated, water flow needs to be able to remove any waste or debris from the top of the coral.

If water flow is inadequate, algae can start to build over the opening of the tubes, which prevents the polyps from expanding. Even more so, snails, hermit crabs, and algae-loving fish might start to crawl over or pick at this algae which can result in longer periods of retraction.

However, you also want to make sure that you don’t place your green star polyps too close to other corals. These corals grow extremely fast and won’t hesitate to grow over and shade out zoanthids or other peaceful corals.

Because of this, many hobbyists like to keep them on a rock island of their own as they will rarely grow onto the substrate. Another option is to keep them around much more aggressive coral species (like LPS corals) that should fight back any green star polyps that try to invade their space.

Another popular option for green star polyp placement is the back or the bottom of the reef tank. Many hobbyists choose to create a background of green star polyp or a lawn on a bare bottom setup. It only takes a small piece of frag to have a waving mat of green within a couple of months.

Temperament In The Aquarium

Green star polyps will not sting other corals and are very peaceful. However, they are highly invasive and will not hesitate to grow over and shade out other corals.

As mentioned before, these corals do best when isolated. You do not need to worry about other corals being stung by them, but rather taken over by them. As long as green star polyps are kept away from other, less aggressive corals, then they should stay manageable.

Though these corals aren’t known to have a powerful sting, it is still recommended to keep them away from other corals at all times to prevent aggression.

Are They Toxic?

There is some belief that green star polyps are toxic and can release damaging chemicals into the aquarium when stressed, like zoanthids. However, this is largely a myth and has yet to be proven within the hobby.

If you are concerned about green star polyps releasing toxins, use gloves when handling and run activated carbon. Otherwise, it is extremely rare, if not impossible, to have any toxin complications due to green star polyps.

Care And Maintenance

Green star polyps are one of the easiest corals to care for, though some hobbyists can have difficulty with them due to the reef tank being too clean, inadequate flow, or extreme lighting.

Otherwise, green star polyp maintenance and upkeep are straightforward.

Dosing

Like other corals, green star polyps need available nutrients in the water column. They need nitrates, phosphates, magnesium, calcium, and a stable alkalinity for healthy growth and vibrant colors.

That being said, these soft corals do not need additional nutrients to be dosed other than what is introduced through feedings and fish waste. In fact, many hobbyists look to slow down green star polyp growth rather than speed it up.

Feeding

Many hobbyists choose not to feed their green star polyps as they get the majority of their food through photosynthesis, but they’ll definitely enjoy some supplemented foods every now and then.

For best results, use a powder or liquid food, like zooplankton; these corals are not able to take in larger foods through their mouths.

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Trimming And Algae

Green star polyps grow fast, and eventually, you will need to control that growth. Some hobbyists choose to frag these trimmings, though the supply might outweigh the demand.

These corals can be difficult to completely remove from a surface and will often grow back after some time. When you see green star polyps growing somewhere you don’t want them, simply scrape them off and dispose of them. Make sure you get all the pieces as they can reseed themselves elsewhere in the tank.

Another way to combat green star polyp growth is by shading it out with a larger object. This can affect other corals too if not carefully placed, but it is an effective way to deprive the coral of necessary light for growth.

At the same time, you will want to look out for algae growing on the mat of the coral. It is recommended to use a turkey baster weekly to gently remove any algae or debris that might be caught. If you notice that your green star polyps have been closed more than usual lately, it could be bothersome algae.

What Are Good Tankmates?

Green star polyps can be kept with nearly everything, including not reef-safe species. Here’s how.

In theory, green star polyps can be kept with anything from clownfish and tangs to triggers and angels. This is due to the fact that this coral grows so incredibly fast. There is still the very real possibility that not reef-safe fish will eat green star polyps, but these corals are very likely to bounce right back and make up for what had been lost.

It should also be noted that green star polyps might not look as appetizing as other fleshy large polyp stony (LPS) corals, so some coral-hungry fish might leave it alone. If you find yourself with a fish that eats everything you put into the tank but you’re still determined to have corals, then get an inexpensive frag of green star polyps and try your luck.

Fragging

It should come as no surprise that green star polyps are incredibly easy to frag. The hardest part will be separating the pieces from the rock.

In order to frag green star polyps, first, find a manageable side of the rock where the mat will be easy to separate. If you can’t find a good place to cut, then choose the best spot and use a scissor, scalpel, or razor blade to cut through and detach the piece from the rock.

For the most part, it doesn’t matter how big or small of a piece you frag as it will quickly recover and start growing. Simply attach the frag to a frag plug with superglue (cyanoacrylate). You may dip this frag in iodine or a special coral mix, but this is not necessary.

Place the frag towards the bottom of the reef tank. The polyps should start to open in a few days, though these corals can be temperamental after handling. Do not worry as they can survive a couple of weeks of being retracted.

As mentioned before, your green star polyps may grow too quickly for how much fragging you can manage. These excess corals can be moved to the sump to help with nutrient exportation, given to another hobbyist, or disposed of correctly. If you want a video tutorial, you can check out the video below by OceanStateAquaticsTV.

How Long Does It Take For Them To Spread?

Green star polyps can cover a rock in a matter of months. Growth may be slow initially and your coral might not even open for a few days when you first introduce it into the reef tank.

If conditions are right though, you will have new growth almost every day. This can be seen on the edges of the mat, where the flesh is light purple or white instead of the dark reddish-purple of the rest of the colony.

If you find that your green star polyps aren’t opening, try to keep conditions stable. You will want to move them around to new areas of the tank for better flow or lighting, but it is best to leave them where they are until they open. If you see algae starting to grow on top of the mat, gently waft away or turkey baster the algae off.

At the same time, make sure there are available nutrients in the water column. It is not unheard of for green star polyps to not open when sufficient nutrients aren’t available.

Closing Thoughts

Green star polyps are one of the best corals and one of the worst corals. They offer vibrant colors and exciting movement to all levels of the aquarium, but they can easily outcompete other species and be extremely difficult to remove once introduced to the tank.

They are one of the best beginner corals due to their resilience and relatively low care requirements, but can also make a beautiful backdrop or lawn for more intricate setups.

📘 Want to learn more? This article is part of our complete Saltwater Fish & Reef Guide — your ultimate resource for marine fish, coral care, reef setup, and more.

Soft corals were my entry point into reef keeping, and I still think they’re the best place for any hobbyist to start. They’re forgiving with water parameters, grow quickly when happy, and many of them have a flowing, dynamic movement in the tank that you just can’t get from any other type of coral. My 125-gallon reef has always had a mix of softies alongside the SPS, and they fill the tank beautifully.

Coral reef tanks are a great way to add some life and color to your home. They can bring out the natural beauty of your fish and other marine inhabitants while also adding intrigue in your reef aquarium. Soft corals are an excellent addition to any tank because they offer superb coloration as well as providing nutrients for other organisms that live in your tank. These 9 soft coral types I recommend will look absolutely amazing in tanks!

Introduction

Soft corals are largely considered to be some of the easiest corals in the hobby. These corals usually lack a calcium carbonate skeleton and have very fleshy polyps. Some of the most popular soft corals to come across are zoanthids and mushroom corals, but there are many species and variations available.

Though these corals might seem easy, they can bring unique challenges to the tank, whether it be a toadstool coral that hasn’t opened in weeks or pulsing xenia that are taking over the rest of the display. When done correctly, they can bring as much color and excitement to the tank as any other species of more advanced coral.

How Many Species Are There?

In order to know how many soft coral species there are, we first need to understand the taxonomy of corals.

At the highest rank, corals belong to the Cnidaria phylum¹, which also contains jellyfish. After that, they may be part of the Octocoralia subclass or Hexacorallia subclass in the Anthozoa class. Subclasses are dependent on the symmetry of the polyps; soft corals belong to Octocoralia while stony corals belong to Hexacorallia.

From these subclasses, corals then get broken up into four main orders that are commonly kept by reef tank hobbyists:

• Corallimorpharia (approx. 50 species). These are considered soft corals as they lack a skeleton entirely, like mushroom corals.
• Alcyonacea (approx. 1500 species). These corals are known as the true soft corals even though they contain sclerites, which are small pieces of calcium carbonate skeleton present in the flesh of the coral. Examples of Alcyonaceae are leather corals as well as gorgonians.
• Zoantharia (approx. 100 species). Zoanthids are also considered soft corals, though they commonly incorporate sand and other hard materials into their flesh for structure.
• Scleractinia (approx. 1600 species). These corals are considered true reef-building corals as they create their own calcium carbonate skeleton; this order contains large polyp stony (LPS) corals and small polyp stony (SPS) corals. Some of the most common species of Scleractinia are Acropora spp. and Euphyllia spp..

These approximations are always changing so there can never be a sure number. However, it can be assumed that there are about 1500 species of true soft coral. Consider that not even a fraction of these are available in the home aquarium hobby, though there is still an overwhelming selection to choose from.

It should also be noted that even though SPS and LPS are categorized together in the Scleractinia order, they are considered to be very different in the reef tank hobby.

The 9 Best Soft Coral Types (Species of Soft Corals)

Here are the most common species of soft coral you’re likely to come across at your local aquarium store and their care requirements.

We got a video above from our YouTube Channel that you can follow along. If you like our content, be sure to subscribe as we post new videos every week! We go into more details below in our blog (and have links where you can purchase them).

1. Zoanthids

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Zoanthids are loved by beginner and expert hobbyists alike. There are many varieties of zoanthid available, coming in all colors and patterns. This diversity can make some zoanthids go for thousands of dollars.

Zoanthids are very easy to care for if they like your tank; these corals are notorious for closing up for weeks at a time for apparently no reason at all. They can quickly overgrow other corals and their potential palytoxin can deter some hobbyists.

Otherwise, multiple types of zoanthid can make a beautiful zoa garden at low, medium, and high placements of the tank with moderate flow and lighting.

2. Mushroom Corals

Mushroom Corals

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The Mushrooms coral at first glance may not be the most exciting coral to have, though hobbyists especially favor the Ricordea species, R. florida and R. yuma. Mushroom corals can be hairy, bumpy, or smooth and can come in purples, blues, greens, oranges, yellows, and reds.

Mushroom corals are some of the easiest to frag, which can be good practice for beginner reefers. These corals also have a unique walking-propagation ability where they leave pieces of themselves behind to create new mushrooms. This can quickly lead to overgrowth, which can sometimes be difficult to control.

3. Toadstool Leather

Toadstool Leather Coral

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Toadstool corals are some of the largest corals available, with some species growing 2 feet across. Luckily, these corals are also very easy to frag in order to help control rapid growth. They are limited in colors, coming only in greens, browns, tans, and yellows, but can have varying tentacle lengths.

These corals regularly shed a thin layer of their flesh about once every month. This may be due to stress, but it is usually to help keep algae and other debris off the coral. Because of this regular shedding, they do best in moderate to high water flow.

4. Green Star Polyps

Green star polyps (GSP) are some of the fastest-growing soft corals, which is why some hobbyists avoid them entirely. It’s strongly recommended to keep them on a rock island on their own in order to prevent them from spreading everywhere; it is also very common to see them on the back of the reef tank to create a wall of shimmering green or on a glass-bottom to make a waving lawn.

While green star polyps are one of the best choices for beginner hobbyists, many reefers regret introducing them into their tanks. Luckily, they are easy to frag as well.

5. Pulsing Xenia

Xenias are one of the most popular soft corals next to green star polyps. These pale pink and purple corals bring immense movement to the tank as they pulsate their polyps without the need for additional water flow.

Unfortunately, some xenia don’t pulse or stop after some time for unknown reasons even though they might be completely healthy otherwise. As long as they are kept in low to moderate flow and low to moderate lighting, they will continue growing regardless of if they stop pulsing.

6. Kenya Tree

Kenya tree corals can fill up large spaces in the reef aquarium with their fluffy branches. Though they might be considered plain in their dull pink and brown colorations, these corals have a softness that not many other species offer.

The problem with Kenya tree corals is that they spread rapidly. These corals are able to propagate by sending off their branches to other parts of the tank where they quickly establish themselves; these new frags are also hard to completely remove from the rockwork, which makes them very difficult to control.

7. Colt

Colt corals (picture source) are very similar to Kenya tree corals and difficult to tell apart even though they’re in two totally different genera. There are a few ways to tell these two species apart.

First, colt corals have fuller and more transparent branches compared to the thick, opaque branches of Kenya trees. Second, colt corals can be described as more slimy than Kenya trees when handling, which resemble the feeling of a sturdier leather coral; remember, try avoiding touching your corals as much as possible to not stress them out.

8. Devil’s Hand

Devil’s hand corals are named after their unique fingerlike appearance. These corals are a type of leather coral, like toadstools, which means that they also shed due to stress or for cleaning; because of this, they need higher water flow to help remove the flaking flesh in the process.

Unlike other leather corals, devil’s hand corals have very short tentacles which can make them look like they’re not fully expanded.

9. Pipe Organ

Pipe organs aren’t very common to come across in the home aquarium even though they come in beautiful floral patterns. These corals are not your typical soft coral. In fact, these soft corals have an intricate red calcium carbonate skeleton, which earns them their musical name!

This slow-growing skeleton needs to be kept clean from algae and detritus with proper water flow. They also need available calcium and stable alkalinity to build their skeleton, which can make them more challenging than the other species on this list.

What Is The Difference Between These and Hard Corals?

When talking about aquarium corals, you may come across words like LPS, SPS, hard/stony, or soft corals. In general, soft corals are considered the easiest with LPS best for intermediate hobbyists and SPS being saved for only the most dedicated reefers. But anatomically, these corals are very different.

Hard Corals

Hard corals, also known as SPS, belong to the Scleractinia order and are responsible for reef-building. They form large calcium carbonate skeletons that house symbiotic zooxanthellae in fleshy polyps. As members of the Hexocorallia subclass, their polyp symmetry is divisible by six.

These skeletons are usually branched and form the picturesque reefs we are used to seeing. They house a plethora of life, including fish, invertebrates, bacteria, and other microorganisms.

Softer Corals

Soft corals–according to the aquarium hobby–belong to the Corallimorpharia, Alcyonacea, and Zoantharia orders. These corals do not form full calcium carbonate skeletons and create very fleshy polyps. Some species, like those from Alcyonacea, form smaller skeletal structures called sclerites. As members of the Octocoralia subclass, their polyp symmetry is divisible by eight.

Interestingly, most soft coral species do not have fossil records as the animal has no concrete structure that can be preserved.

Keeping Them In The Aquarium

Soft corals are considered to be some of the easiest corals to keep in the aquarium and are often recommended as corals for beginners. Many species do not require intense reef lighting or flow and they can grow very quickly in less-than-ideal conditions.

On the other hand, some hobbyists greatly struggle with keeping some of these ‘easy’ corals. In some cases, the tank might be considered too perfect for these undemanding species and the coral fails to thrive as a result.

For example, it is strongly believed that zoanthids favor dirtier water with plenty of available nutrients. More advanced hobbyists keeping delicate SPS might have water that is too clean and void of nutrients to sustain a healthy zoanthid colony.

So even though soft corals do not require much special attention, there is no guarantee that they will be easy in your aquarium setup.

What Is The Easiest Type To Keep?

With that being said, which soft corals are the easiest to keep? For the most part, all of them.

There are many options for beginners and advanced reefers alike to choose from. Here are the most common recommendations:

• Green star polyps
• Mushroom corals
• Leather corals
• Pulsing Xenia
• Zoanthids

As mentioned before, though these corals are generally considered easy, they can be some of the most challenging corals you have in your aquarium depending on your setup.

When Can You Add Them To The Aquarium?

If you’re a beginner just starting to explore the saltwater world of the aquarium-keeping hobby, you’ll be eager to add your first coral to the tank. In order to succeed in this hobby though, you will need lots of patience.

Though soft corals are very forgiving of poor water parameters, they are still much more difficult to keep than marine fish or freshwater plants. They need stability, available nutrients, good lighting, and good water flow. New setups rarely have any of these.

In short, it is not recommended to add soft corals to a newly established tank during the first 3 months. These 3 months test many new hobbyists with algae outbreaks, diatoms, Aiptasia, and livestock compatibility. Corals are expensive and it isn’t fair to them or worth the risk of introducing them into unfavorable conditions.

Instead, allow the tank to establish a good beneficial bacteria population. Control algae and find the perfect photoperiod for your setup. Figure out if your tank runs best with weekly or biweekly water changes (or none at all if you are brave enough😅) . Trace how your nutrient import and export changes daily. Then, you may add corals.

Soft corals are good starter corals for many as they don’t require nutrients to be dosed. As long as a reliable marine salt mix is being used and nutrients are being added into the tank via fish food, waste, and other detritus, your soft corals should be able to sustain themselves.

For mature tanks, soft corals can be added at any time. More importantly, it is necessary to find the right placement for them in order to keep them away from other corals. Though most soft corals are not capable of stinging, they can easily overgrow and shade out other species.

Closing Thoughts

Soft corals are some of the easiest species to keep and come in all colors, shapes, and sizes. There are some differences between the scientific classification for soft corals, LPS, and SPS that differ from aquarium standards, but all soft coral species generally require the same care.

With so many options to choose from, a soft coral and macroalgae setup might just be the next setup you have in mind for your own saltwater aquarium. Have any questions for me? Leave them in the comment section and let’s start a discussion. Happy Reefing!

📘 Want to learn more? This article is part of our complete Saltwater Fish & Reef Guide — your ultimate resource for marine fish, coral care, reef setup, and more.

Bubble coral is one of those LPS corals that looks absolutely spectacular when it’s happy and fully inflated, and I’ve kept them in my reef over the years. They do require a bit more attention than beginner corals — placement matters a lot, and their sweeper tentacles extend farther than the bubbles suggest. Get their care right and they’ll be a centerpiece coral that draws attention from anyone who sees your tank.

Proper Bubble Coral Care can be a little more complicated than other types of corals. They require specific lighting and water parameters to thrive, so it’s important that you take the time to learn what they need before adding them to your tank! This guide will walk you through all the steps for setting up a bubble coral system and caring for these delicate creatures. Let’s get started!

A Quick Overview On The Bubble Coral

Origins And Habitat

Bubble corals come from a wide range of environments. They have been found in dark and turbid waters as well as bright and clear seas.

Bubbles are largely found throughout the Indo-Pacific and the Pacific Ocean, but most available colonies in the hobby originate from Indonesia specifically; more Australian colonies have entered the trade due to difficult propagation and trading bans on coral.

Naming

These corals are commonly known as the bubble coral, grape coral, or pearl coral due to their appearance. Though they have previously been categorized as a member of the Euphylliidae family, their exact taxonomic categorization is largely up for debate and still unknown.

The common name ‘bubble coral’ is actually used to describe two different genera, Plerogyra and Physogyra. The difference between these two genera is that Plerogyra spp. usually have larger bubbles and a blade-like skeleton while Physogyra spp. have smaller bubbles with a flatter skeleton; Physogyra spp. are often referred to as pearl bubbles¹.

Some of the most common species to come across are Plerogyra sinuosa and Physogyra lichtensteinii. Luckily, the care requirements for these two genera do not differ.

In the aquarium hobby, these corals may be further named according to their area of collection. For example, you may come across ‘Aussie bubble corals’, ‘Indo bubble corals’, ‘Marshall Island bubble corals’, or wherever else they might have been collected from; these names may even be carried over for those corals that have been aquacultured.

Some hobbyists find Aussie bubbles to be more sensitive than Indo bubbles, but this is specific to each tank.

What Do Bubble Corals Look Like?

These corals look exactly how you might imagine them. Bubble corals are large polyp stony corals (LPS) with a calcium carbonate skeleton and round fleshy polyps. They can grow to be several inches across and reach reasonable heights.

There are two main types of bubble coral variety:

• Ones with rounded, grape-shaped bubbles; some of these that have smaller bubbles may also be labeled as ‘pearl’ (Physogyra spp.)
• Ones with irregularly shaped bubbles

No matter what kind of bubble coral you have, your coral should always be fully extended. The level of polyp expansion can correlate to lighting. Low lighting can cause your coral to inflate more in order to optimize photosynthesis and high lighting can cause more compacted bubbles.

Bubble corals have very jagged skeletons which can easily puncture their own bubbles. This can make transporting them very difficult, but not impossible. For as fragile as they are, hobbyists have found them to be incredibly resilient and can come back from near death.

Along with being fully extended, your bubble coral should have bright colors; though they do not come in many different colors, the greens, whites, yellows, and pinks of your coral should be vibrant. Bubble corals have almost transparent flesh, but color should never be entirely absent.

At night, these corals retract their bubbles. They send out long, clear sweeper tentacles that are used for feeding and attacking any corals that get too close; these tentacles do have nematocytes, or stinging cells, which can cause some irritation or inflammation to human skin and even more damage to nearby corals.

During this time, the skeleton will be exposed and you will be able to see how jagged it really is. Remember, this skeleton should never be exposed at any other time.

Placement In The Aquarium

Bubble corals aren’t the most popular coral in the hobby, but they’re one of the most adaptable.

These corals can be placed in nearly all locations of the aquarium as long as adequate acclimation is allowed for and care is given when handling; these corals can be more top-heavy than others, so long-term placement needs to be secured with superglue (cyanoacrylate) or epoxy.

Do They Like High Water Flow?

No, bubble corals do best with low to moderate water flow. Flow should be just enough to keep the bubbles slightly moving – aim for gentle water movement. Anything more than this could damage the coral.

Moderate flow is needed for these corals to remove algae and debris as well as to keep them fed. At night, they use their sweeper tentacles to help catch food that needs to be moved past them with a current.

How Much Light Do They Need?

Naturally, bubble corals are found in a variety of light intensity conditions. They can withstand lower light (50 PAR) on the substrate or be acclimated to the top (150 PAR) of the reef.

Because of how large they can get and how delicate they are if they fall, most hobbyists choose to keep them on or near the substrate. If choosing to keep them on the sand, make sure that the water flow is not pushing granules onto the coral. This can cause irritation which can lead to retraction and infection.

Wherever you choose to place them, they should be secure and away from anything that could rub up against them, like rock, the aquarium glass, or other corals.

Temperament In The Aquarium

Though bubble corals might look harmless, they need to be given their space in the aquarium. Their sweeper tentacles are relatively long and very capable of inflicting a sting on nearby corals.

It can be difficult to judge placement in the aquarium at first as these sweeper tentacles usually only emerge at night. In general, it is best to leave about 5-6 inches of buffer room for your coral to fully expand and extend its tentacles.

It also isn’t uncommon for your bubble coral to change shapes throughout the day. When the lights come on, your bubble may still have its sweeper tentacles out with a lot of exposed flesh. As the day goes on and the light reaches higher intensities, it may form more compact bubbles.

Care And Maintenance

Bubble corals aren’t the easiest species of LPS, but they don’t require much special care either. As mentioned before, the biggest concern with these corals is transporting them and acclimating them correctly.

Otherwise, they need standard reef conditions and can be kept with hang on the back, canister, or sump filtration. If you start to notice algae growing around the skeleton, it should be carefully removed with a turkey baster or by hand to prevent it from smothering the polyps.

Dosing

Bubble corals do not need any additional nutrients as long as a quality marine salt mix is being used. The main nutrients these corals need are nitrates, phosphates, calcium, magnesium, and stable alkalinity; contrary to once-popular belief, corals need available nitrates and phosphates for the best health.

Because bubble corals make their own skeletons, they heavily rely on calcium, magnesium, and alkalinity for steady growth. These parameters are usually maintained through regular water changes, though they might need to be dosed if keeping larger colonies of LPS and/or keeping small polyp stony corals (SPS) as well.

Simply track how parameters change in the tank between water changes. This will show how nutrients are being used and recycled throughout the system. If levels fall too much, then it might be time to start dosing; make sure to only dose what is needed.

Feeding

Unlike other species of LPS, bubble corals appreciate being fed every now and then. They get the majority of their food from the water column, but will usually willingly accept any supplemental feedings.

In fact, these corals can be fed relatively larger pieces of meaty foods like fish, shrimp, and crab in addition to smaller foods like brine shrimp, mysis shrimp, and coral-specific products. A great coral food to try is reef-roids.

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Simply place the food near the mouth of the coral and wait for it to start moving it in. Do not overfeed as this can create unnecessary waste and start to stress out your coral in the long run.

What Are Good Tankmates?

Bubble corals are one of the most tankmate-friendly coral options available. As long as it’s reef-safe, there’s a good chance it will get along with your bubble.

Again, the main concern you should have is keeping your bubble coral undamaged. Anything with pincers or sharp teeth, like crabs or triggerfish, could easily damage your coral. Otherwise, tangs, gobies, damsels, and wrasses are all possible options.

Unlike other LPS with longer tentacles, clownfish do not host bubble corals nearly as much. Though bubbles don’t bring as much movement to the aquarium as other similar corals, you don’t have to worry about losing your colony to an overly aggressive clownfish.

Fragging

Fragging bubble corals is usually not recommended for any hobbyist. But if you’re dealing with an overgrown coral, fragging is your only option.

This process can be most likened to fragging a wall hammer coral in terms of difficulty. It is recommended to attempt fragging a bubble coral only if an electric saw is available. Here is a great video by MileHighReefers that shows the fragging process. I’ll provide a summary below.

There are two main ways to frag your bubble coral:

1. Just go for it. If choosing this method, first make sure all polyps are closed as much as they can be. Do this by lightly touching the coral, making sure not to cause injury. Next, look for already-defined lines of division; if your bubble coral is branched, divide the branches. It is not recommended to cut through the mouth or the flesh unless highly experienced.
2. Have some patience. This method takes a little more time but tends to have higher success rates, especially if needing to split a large polyp. First, use a rubber band to divide the polyp; you want to force the coral to separate into two. From here, you will have a defined line that can be cut with a saw or, if done carefully, a Dremel tool.

Both of these methods carry high failure rates, though bubble corals are known for bouncing back pretty quickly if something goes wrong.

Why Is Your Coral Dying?

There are three main reasons your bubble coral might be dying: water flow, injury, or water parameters.

Bubble corals need some flow to deliver food and to keep them clean, but anything more than enough will damage their delicate flesh. If you notice your coral start to close up or recede from the base, check how much direct flow it is receiving and move accordingly.

Injury and infection are the biggest killers for bubble corals and often happens during transportation. When purchasing a coral, but sure that it is fully extended and shows good coloration. Make sure to handle the coral from the base to prevent any further stress or injury; use a coral dip or iodine to facilitate healing. Brown jelly infections are also another common issue with bubble corals.

Unfavorable aquarium water parameters, including lighting conditions, can also cause your coral to die back. Usually, other corals in the tank will also show signs of poor water quality, but LPS can recede very quickly once started. If you recently moved your coral to a higher spot in the tank and it is failing to extend, then you might not have allowed enough time for acclimation.

Closing Thoughts

Bubble corals are relatively easy to care for, but fragging and any excessive handling can cause problems. They don’t come in many colors, but their inflated appearance and full expansion bring life to the middle and lower regions of the tank. With some acclimation, they can even be moved to the top of the reef!

📘 Want to learn more? This article is part of our complete Saltwater Fish & Reef Guide — your ultimate resource for marine fish, coral care, reef setup, and more.

Toadstool coral is one of my top recommendations for anyone setting up their first reef tank, and I keep them in my own reef. They’re remarkably hardy, grow relatively quickly, and the way they wave in the flow is something I never get tired of watching. One thing I always tell people: don’t panic when a toadstool sheds its slime coat and looks terrible for a few days — it’s completely normal and part of how they grow.

Looking to learn about proper Toadstool Coral Care? If so you are in luck! Toadstool Corals are a perfect choice if you are looking for a beautiful, hardy coral to add to your reef tank at home Toadstool corals are known for their bright colors and easy care. In fact, these beauties will thrive in even some of the most basic aquarium setups! Learn more about this fascinating invertebrate below so that it can become an integral part of your underwater ecosystem!

Quick Overview

Origins And Habitat

Like so many other species, the toadstool leather coral is commonly found throughout the Indo-Pacific off the coasts of Fiji, Australia, Tonga, and the Solomon Islands. These corals thrive in shallow, mixed reefs where they often grow into huge plates that can quickly overshadow life below.

Though they will always grow towards the light, toadstool corals an be seen growing at most levels of the reef. If they are overshadowed by another coral, they can easily extend their stalk so that tentacles are once again at optimal lighting conditions.

What Is It?

In conversation, toadstool corals are regularly referred to as leather corals. However, there are actually several genera of leather coral, which can get confusing as they look and act pretty similar to one another; they are also all soft corals that lack an internal skeleton structure.

The most common species of leather coral to come across in the aquarium hobby are:

• Sarcophyton spp. are types of toadstool leather coral. Both Sarcophyton spp. and Lobophytum spp. have dimorphic polyps which means that some tentacles are extended while others stay in the flesh of the coral; toadstool leather corals have much longer extended tentacles than the other genera.
• Lobophytum spp. include devil’s hand leather corals. These corals also have dimorphic polyps, though their extended tentacles are much shorter and less present than those of toadstool corals. Devil’s hands are popular for their unique claw-shaped formations instead.
• Sinularia spp. are even more branched than Lobophytum spp. and are largely referred to as finger corals. These corals have small tentacles close to the flesh of the coral that can make for a fuzzy appearance.

Other leather coral genera you may come across are Kenya trees (Capnela), colt corals or finger leathers (Cladiella), colt corals or cauliflower colt corals (Klyxum), and nepthea or cauliflower corals (Nepthea).

These corals can be very difficult to tell apart as undeveloped frag pieces. As you can also see, their names are very confusing, which can make identifying your leather very difficult even as fully grown corals.

What Do They Look Like?

Toadstool corals are one of the most recognizable species of leather coral and one of the easiest corals to identify in general. A Toadstool leather coral has a singular stalk with a large cap. This cap features extended tentacles which can vary in length across species. Toadstool corals are very accurately named after their similar appearance to toadstool mushrooms.

Though toadstool corals are relatively plain in color, only featuring greens, browns, tans, and yellows, they are a popular addition to the reef aquarium because of their impressive sizes. These corals can grow to be almost 2 feet across, though they usually stay under a foot in the aquarium setting!

Luckily, toadstool corals are very easy to propagate so they are easy to handle if they get too big.

Placement In The Aquarium

Toadstools are very adaptable corals, however, they aren’t necessarily the least demanding. For being such a beginner-friendly coral, toadstools do best under low to moderate lighting with moderate to strong flow requirements.

Many hobbyists find that lighting plays a big role in the colors expressed by your toadstool leather coral. Higher lighting will usually cause your toadstool leather coral to be brighter and more vibrant. However, these corals are a low-light species and only need about 50-150 PAR¹. They need to either be acclimatized to higher areas in the tank over time or left to grow their stalk naturally.

Keep in mind that these corals can get huge and will block out light from other corals below. While they can be placed at all levels of the aquarium, it takes some planning to make sure that you don’t lose a big chunk of real estate in your reef aquarium.

Toadstool corals also need moderate to high flow. In most cases, flow can never be too strong as the coral will adapt and strengthen its stalk; of course, move the coral if it is being bent over by the current. On the other hand, flow can be too low.

Shedding

Leather corals are unique as they have the ability to shed. This happens about once every one to two months and is a natural part of how they keep algae and waste off of them. When your toadstool coral is getting ready to shed, you might notice that it changes colors and has its tentacles retracted for a couple of days.

Eventually, you will see a thin shiny layer form on top of your toadstool coral. Over the next few days, this layer will be shed; this shed can get stuck on other rocks and corals in the tank, but it is not harmful. Once done shedding, your toadstool coral will emerge brighter and fuller than before.

In order to make sheds easy for your toadstool leather coral, it is best to keep it under moderate to high flow.

While shedding is a natural process to keep algae and waste from building up on your coral, it can also be a sign that something is wrong in the water column. Toadstool leather corals are notoriously temperamental with some hobbyists having corals that refuse to open on weeks on end.

For the most part, this isn’t a concern if water parameters are stable and all other livestock is doing well. Expect your leather coral to shed towards the end of this ‘dormant’ period.

Temperament In The Aquarium

For being such a large coral, these corals are very peaceful and almost harmless to other species. There are two main concerns you might have if planning on getting a toadstool coral.

Space

These corals get huge and their growth is unpredictable. Their stalk does not take up much space on the rockwork, but their cap can spread out several inches.

The direction of their growth also largely depends on the water flow and light, so they can take on weird shapes that you might not have allowed for. In general, it’s best to place toadstool corals first and allow some time for them to grow before adding more corals below them.

Luckily, these corals do not have sweeper tentacles and can’t sting, so that is not a concern.

Toxicity

Some species of toadstool coral are toxic and can engage in chemical warfare. This might sound scary, and the effects can devastate a tank, but there are ways to be prepared should this happen.

In most cases, toadstool leather corals release their toxins under stress and or if they’re dying. If this happens, you will see other corals also start to rot, shed, or die. For this reason, it is important to remove melting leather corals from the tank as soon as they are noticed; it is possible to frag dying corals if healthy areas still remain.

Once the problem coral has been removed, add activated carbon to remove organic impurities (toxins) from the water and perform large water changes over the next few days. If possible, the remaining corals should also be removed from the reef aquarium and moved into quarantine until the tank is ready again.

Care And Maintenance

Otherwise, toadstool coral care is easy and straightforward. These corals check all the boxes of growing quickly, bringing movement to the tank, and being easy to keep.

There are many different species and varieties of toadstool leather coral, which can bring some difficulty to more advanced hobbyists if preferred. For example, the Fiji yellow coral (Sarcophyton elegans) is one of the hardest species to keep as it requires high light and high water flow to keep its yellow frilled appearance fully vibrant.

Water Parameters And Dosing

Toadstool corals do not need any special water parameters. As a soft coral, they do not need to build a calcium carbonate skeleton so they do not heavily rely on many nutrients to grow like large polyp stony corals (LPS) or small polyp stony corals (SPS).

That being said, toadstool corals need average reef conditions with available nitrates and phosphates. Too often, hobbyists strive for perfect parameters with 0 ppm across the board. Though this might seem like the perfect system, limited nutrients are actually a sign of an unhealthy tank.

Instead, nutrients should be available for coral growth. If keeping only soft corals, these nutrients usually do not need to be dosed and are introduced naturally into the tank through fish waste, food, and other debris. However, if keeping larger LPS or SPS, then it is recommended to dose those nutrients that are being used for growth.

Feeding

These corals do not need to be fed and will grow quickly enough on their own. In fact, these corals are actually too slow to be fed effectively; their tentacles are very slow to retract so food has the chance to be swept away or eaten by something else in the meantime.

If you are really wanting to feed your toadstool leather coral, then small planktonic foods and specific coral foods, like coral powders, Phytoplanton, and pellets, can be given once or twice a week.

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What Are Good Tankmates?

Toadstool corals can be kept with nearly all reef safe fish and invertebrates. It should be noted that toadstools with long tentacles may be mistaken as an anemone by clownfish. Unlike other anemone-lookalikes that retract when hosted, like Euphyllia, toadstools are typically better at withstanding annoyances from tankmates and will stay expanded.

In fact, I have personally had hermit crabs crawl all over the tops of toadstools. Though the coral retracted when touched in that one location, it left its other tentacles open and was quick to extend to full size once the hermit crab left.

Still, more coral-hungry fish and invertebrates should be avoided. Anything with teeth or pincers is capable of cutting through the soft flesh of a leather coral, which can lead to toxin release in extreme cases.

Fragging

Toadstool corals are one of the easiest corals to frag but can be a little intimidating due to their size and the possibility of toxin release. There is little reason to worry though as long as all tools and equipment are laid out ahead of time.

First, you will need to decide if you want to frag the toadstool coral still inside the main display or if it is possible to remove it and frag it in another tank or bucket. Sometimes the coral is too large or too integrated to remove from the tank, in which case you will need to frag it directly in the aquarium. Here is a good video on how to frag a toadstool coral by How To Reef. I’ll have some details below if you want to keep reading along.

To frag a toadstool that is still in the aquarium, simply use a scissor or a razor blade to cut pieces from the top. Be sure to avoid the stem as the parent toadstool will use this to grow a new cap. Remove the pieces of frag. It is strongly recommended to run activated carbon and perform larger water changes the following days to remove any possible toxins.

Many hobbyists like to trim their toadstool frag pieces more uniformly in order to get a more symmetrical appearance once the coral grows; this is not required, but simply trim the pieces into squares and discard or frag the remaining scraps.

In order to attach the frag to a frag plug or a piece of rock, you may use superglue (cyanoacrylate) or rubber bands. Superglue isn’t as effective with toadstools as these frags may shed several times before attaching to the given surface. In this case, be prepared that some frags may fall off before fully attaching.

A more secure way to attach your toadstool frag is by using a rubber band. Simply wrap the rubber band around the frag and the rock/frag plug. Make sure that the pressure isn’t too tight as this can cause the frag to split apart.

Once everything is done, simply dip the frag in fresh saltwater and/or a coral dip to make sure that no toxins are released back into the display aquarium and to help with recovery.

Why Won’t Your Coral Open?

As mentioned before, toadstools are notoriously temperamental and have been known to close for weeks on end without any signs of improvement. But how long is too long and when should you start to be concerned?

As mentioned before, toadstools are very hardy. However, this does not mean they will thrive in less-than-ideal conditions. Instead, they can take a long time to acclimatize to changed conditions. For example, a toadstool introduced to a new aquarium may take several weeks to fully open up even if water parameters are ideal.

A closed toadstool leather coral can also be a sign of poor water quality, though other fish and corals will likely show signs of unhappiness first. Another reason might be that your coral is going to shed, whether it be because of stress or because it needs to clean itself. If you notice other corals closing up during this time as well, it would be best to test water parameters.

Lastly, a closed toadstool could be a sign of brown jelly disease. These corals bruise very easily, which can invite infection, namely brown jelly disease. In which case, it is best to remove the affected coral and treat it vigorously as this can be highly contagious.

Closing Thoughts

The toadstool coral is a large, impressive coral that doesn’t require much extra care. Not only are toadstool leather corals easy to care for, but they’re also very affordable, quick to grow, and can be fragged easily. These corals might not be the showiest in terms of color, but their extended tentacles can bring movement to the beginner or advanced reef aquarium setup. Leave us your thoughts on this type of leathery reef builder below!

📘 Want to learn more? This article is part of our complete Saltwater Fish & Reef Guide — your ultimate resource for marine fish, coral care, reef setup, and more.

Mushroom corals are one of the first corals I recommend to anyone setting up a reef tank, and I keep them in my own setup as well. They’re incredibly tolerant of less-than-perfect water parameters, they spread readily, and the color variety available is genuinely impressive. If you’ve never kept corals before, mushrooms are the place to start — they’ll build your confidence while actually looking great in the tank.

Looking for a colorful and easy to care for coral? A Mushroom Coral is as easy as it gets when it comes to easy coral care. These wonderful corals are not only easy to growth, but also come in a variety of colors. They will fulfill the needs of a reefer who is just starting out and satisfy the hobbyist looks for the most exotic corals they can buy. With the popularity of bounce corals and jawbreaker mushrooms, there is a mushroom coral for everyone!

Let’s dive in and learn how awesome these corals are!

Species Overview

Origins And Habitat

Mushroom corals are found throughout most temperate to tropical marine ecosystems. These corals do not need much light and thrive in low flow environments. Most notably, they can be found in Australia, Tonga, Indonesia, with some of the most popular species originating from the Caribbean, namely from the coasts of Florida.

Mushroom corals, or mushroom anemones, can spread very quickly and are often found in large colonies, covering rocks and other structures, including other corals.

Morphology And Common Names

The Corallimorpharia Order¹ is a large taxonomic category containing nearly 50 species. However, most coral species in the reef aquarium trade belong to the Actinodiscus/Discosoma, Rhodactis, and Ricordea genera, which are collectively referred to as mushroom corals.

The mushroom coral is a soft coral, which means that it does not produce a hard calcium carbonate skeleton like large polyp stony corals (LPS) or small polyp stony corals (SPS). As we’ll see later, this makes for easy propagation of the coral.

Interestingly, members of the Corallimorpharia Order are very similar in morphology to SPS (Scleractinia Order), though this is difficult to see without looking at polyp segmentation. Instead, to most of us, these corals resemble the dome-shaped top and stalk of a terrestrial mushroom, earning them their most common name.

While members of Actinodiscus/Discosoma, Rhodactis, and Ricordea are generally referred to as mushrooms, many mushroom corals have been given specific names with more rare and expensive variations being assigned brand names.

For example, members of Actinodiscus/Discosoma are typically named after their colors, like red and blue mushroom corals. Some types of Rhodactis may be named after their color combinations as well, but this genus also contains ‘bounce’ mushroom coral variations.

Ricordea species are simply called ricordeas most of the time due to their unique longer-tentacle appearance and can only be classified into Ricordea florida or R. yuma:

• R. florida has a small mouth that is usually not surrounded by tentacles. The tentacles on the rest of the polyp are random in size and placement. Sometimes these tentacles will have orderly color distribution, but this may be random as well.
• R. yuma has tentacles surrounding the mouth and is much more colorful comparatively. Their structure follows more order and usually has alternating small and large tentacles as you move to the outside of the polyp.

Other Types Of Mushroom

There are several other species that are present in the reef aquarium hobby, but more uncommon to find in your average hobbyist’s tank.

This includes members of Amplexidiscus and Paracorynactis which can be very aggressive eaters.

What Do They Look Like?

Most mushroom anemones are easy to identify, though some have been modified in appearance so that they might resemble other corals at first glance.

These are a few ways you can tell species of mushroom coral apart. Here are several different types:

Disco Mushrooms

Actinodiscus/Discosoma (pictured above) is considered one of the easiest and hardiest genera of mushroom coral. These corals are simple in appearance with a circular disk and a mouth in the middle and lay flatly against the surface; these disc anemones usually has a bumpy texture. Actinodiscus/Discosoma spp. grow a few across in diameter and are most commonly found in solid reds, blues, and greens.

Rhodactis Mushroom Corals

Rhodactis contains some of the more desirable morphs of mushroom coral, like the bounce coral. However, most species of Rhodactis are slightly more ornate than Actinodiscus/Discosoma species and have a pilled or frilly characteristic. They are usually two or more colors with nearly all combinations and gradients available. These corals can range greatly in size and may stay under one inch or grow close to two feet like elephant ear mushroom corals.

Ricordeas

Ricordea has become very popular in recent years, specifically for biotope setups. As mentioned before, there are only two species of Ricordea. In general, ricordea mushrooms are much different from the previous two genera and can be told apart even if interspecies differences might be similar. These ricordea shrooms come in a variety of bright colors, stay pretty small, and are recognized for their bumpy appearance. The most popular variant is Ricordea florida.

Sadly, most plainer-looking mushrooms, like those from the Actinodiscus/Discosoma genus aren’t kept in the hobby as much anymore due to more desirable morphs and because of how rapidly they can spread across an aquarium.

If you’re looking to quickly fill a rock with color in your reef tank though, these mushroom corals can be the perfect addition.

Why Are Bounce Corals So Expensive?

Despite some mushrooms being undesirable, others are extremely favored and go for high prices. In specific, these are bounce mushrooms, like Sunkist Bounce mushrooms and OG Bounce mushrooms, that can go for over $200 and $700 per polyp respectively.

Bounce mushrooms are a modified type of Rhodactis. They are prized for their overgrown tentacles that are often bright colors and patterns. However, it is unknown how these morphs come about, and so they are rarer to come across. This, in addition to the market of assigning brand names, has made these corals some of the most expensive frags in the industry.

While expensive, these mushroom corals don’t require much extra attention than other types of mushrooms Though losing one of these definitely hurts a lot more than a regular $20 polyp!

Placement And Temperament In The Aquarium

Though mushrooms corals greatly in size, shape, and color, their overall requirements are very similar. These corals thrive in reefs with available nutrients as well as in low to moderate reef light and low water flow movement, apart from Ricordea yuma.

The mushroom coral is very forgiving of water parameters, but won’t tolerate being exposed to too much light and high flow conditions. Mushrooms actually have the ability to move around the rock and even completely detach if they do not like their placement. This can lead to some problems, though.

While mushrooms do not have sweeper tentacles that can attack other corals in close proximity, they can actually be pretty aggressive; some hobbyists have even seen their mushrooms win a fight with chalice corals (Pectiniidae Family). If a drifting mushroom coral lands near other corals, there is a chance that it will start to attack.

Because of this, it is also not a good idea to mix different species from different genera together as they will most likely damage each other. Some hobbyists have had success keeping similar mushroom corals together, but this is still a risk.

The main problem with mushroom coral placement is that they cannot be glued to one place. These corals excrete tons of mucus that prevent the glue from sticking and allow them to slip right out of the hold. Instead, a mushroom coral polyp needs to attach itself to another surface that you can then move–though, your coral might have other plans.

This can be done by placing the coral under a permeable container or netting with pieces of rock or frag plugs. Within a few days, the mushroom coral should have attached itself. You may then move your coral to other places of the display, in low light and low water flow.

Otherwise, if you have no other corals in the aquarium, then you can also let your mushroom coral loose in your main display and let it find its own preferred location. Of course, this risks your coral getting stuck in the back of the tank away from light, which could kill the coral.

Care And Maintenance

Once your mushroom has settled, these corals are some of the easiest to take care of and to propagate. As mentioned before, most mushroom corals need the same tank conditions and maintenance besides Ricordea yuma.

General Water Parameters

Mushrooms do not have any specific water parameter needs. Because they are soft corals, they rarely depend on calcium or magnesium due to their lack of skeleton; this is also true for alkalinity, though alkalinity levels should remain constant.

Unless keeping other nutrient-demanding corals, dosing is not necessary. Before you know it, you will probably reach a point where your mushroom population gets out of hand and you will have to remove some.

Otherwise, mushroom corals can adapt to most water parameters as long as they are in the standard range recommended for a reef tank. Of all parameters, these corals will especially appreciate nitrates as too clean of an aquarium can starve the coral in the long run. Mushroom corals can safely be added to new tanks that might fluctuate more in water quality.

In fact, many hobbyists use mushrooms as a warning coral. While most mushroom corals can adapt to changes in conditions, they will shrivel up and excrete mucus when they are stressed. This can be a good indicator that something is majorly wrong in the tank before fish and invertebrates start being affected as well.

Feeding

Feeding your mushroom coral is not necessary. In some cases, feedings won’t show any results and excess nutrients are introduced into the tank.

However, some types of mushroom corals can be very eager to eat and will enjoy smaller foods. Still, it isn’t recommended to feed more than two times a week to avoid excess waste and to give your coral time to digest.

Ricordea spp. care

Some hobbyists have difficulty keeping ricordeas happy in their tank, specifically R. yuma. There are a few reasons why your ricordeas aren’t doing well in your aquarium and it starts with importation.

Because ricordeas can be found close offshore of Florida, there are large populations of wild-caught mushrooms available for sale. This means that all the hardiness that aquaculture brings with other mushrooms has not been evolved by this genus. This can make ricordeas more demanding when it comes to flow, lighting, and stability.

Ricordeas seem to do best under moderate water movement and moderate light with a good source of nutrients available. It is also important to make sure that your mushrooms are healthy when introducing them into your display as wild-caught corals can bring disease and pests into the tank.

However, if you’ve fixed placement and lighting conditions and your ricordeas are still melting, there is not much else you can do. Some aquariums just can’t support some corals no matter how much we try. The best thing to try is finding an alternative or setting up another aquarium completely with ricordea in mind.

What Are Good Tankmates?

Mushroom corals can be kept with a variety of reef-safe fish and invertebrates. Ricordea species are a favorite for biotope setups with macroalgae and other soft corals with endemic fish species, though they can be kept in all other reef setups as well. The way mushrooms grow and their size make them ideal for nano reef tanks.

The main problem you will want to look out for is if your mushroom seems to be closed the better majority of the time. This could be a sign that something in your display is walking over it or stinging it. For the most part, though, mushroom corals are pretty resilient and will learn goby fish or snail habits and will stop closing up at the first touch.

Of course, fish and invertebrates that are not reef-safe should never be placed with coral. This is especially true as mushrooms can excrete a lot of mucus that can get caught around the tank.

How To Frag

Propagating mushroom corals is easy and is usually necessary once colonies start overcrowing rocks and other corals. These corals have a unique feature that allows them to regenerate from a small piece of flesh. First, we need to understand how mushrooms reproduce on their own.

Mushroom corals largely undergo asexual reproduction in the aquarium. However, how they reproduce is dependent on the species of coral. These are two ways that you may see your mushrooms splitting:

1. Mushroom corals have the ability to split into two. Your mushroom coral may start to form an odd figure-8 shape where there have noticeably short and long sides of their polyp. During this time, you might even be able to see two independent mouths forming in the center. Eventually, these two sides will split into two new polyps.
2. Mushrooms can also leave a piece of themselves behind, which will then grow into a whole new polyp; this is known as pedal laceration. In cases like this, you will see your coral stretching in one direction with one section of the foot taut. Eventually, the main foot will detach from this part and the piece will develop a recognizable polyp within a few weeks.

It should be noted that mushrooms that are looking to detach from rocks and move to a new place may also look like #2 and can leave behind a piece in the process.

When fragging, we try to emulate natural splitting. There are two main ways that mushroom corals can be fragged:

1. Take a mushroom polyp that is attached to a small piece of rock. Use a scalpel to divide the coral down the middle near the mouth as it would divide on its own. Then, take a bone cutter and split the rock in half; this helps with the issue of a mobile frag and keeps the two pieces from rejoining.
2. If you’re dealing with a mushroom that isn’t attached to a surface, then you will need another method similar to when you first introduced the coral into your tank. Simply cut the mushroom once down the middle again, or as many times as you would like. Then, use a controlled environment with low flow or use a permeable container that gives time for the frag to attach to a new surface.

Once the coral has attached itself and fully healed, it is time to move the mushroom to the desired place in the tank or give it away to another hobbyist.

Mushrooms are extremely forgiving of being fragged and can survive multiple slicings. It is usually not necessary to dip them before being placed back into the display, but iodine or another coral dip may be used for extra security. If you would like a more visual guide, here is a nice video from Reef Life Aquatics.

Controlling Coral Growth

Though mushrooms can fill empty spaces in the aquarium, they can also quickly start to get out of hand. Because of their ability to regrow from a small piece, it can be very difficult to control populations once established.

If your mushrooms are confined to one section then one of the easiest, but definitely not one of the most convenient, ways to fix this is by removing the whole rock from the display. Sadly, this will remove some of the beneficial bacteria from your tank but it ensures that the mushrooms are gone for good.

If you have mushrooms growing on multiple surfaces throughout the display, then this will be much more difficult and a longer struggle. This method involves removing the mushrooms one by one by hand. Simply keep removing any mushrooms you see and try to scrape away as much of the flesh as possible.

If you’re comfortable with bringing in some chemical options, then anything that is meant to kill Aiptasia will also work on a mushroom coral, like Aiptasia-X. You will need to be careful as these solutions can also damage other nearby corals.

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One of the last ways to deal with explosive mushroom growth is by reducing the number of available nutrients in the water column. However, this can be tricky and can have ill effects on the rest of your reef.

Mushroom corals thrive in dirtier water. Once those nutrients are taken away, growth should hypothetically decrease along with them. This method is only recommended for experts in water chemistry.

Closing Thoughts

Mushrooms are an understated coral that can bring color to low flow areas of the display with low light conditions. With such a large variety of mushrooms to choose from, there are colors and patterns for everyone.

These corals can spread very quickly, so population control will be needed to keep numbers in check or to regularly frag new pieces. Otherwise, they will continue to grow wherever they can when nutrients are available.

📘 Want to learn more? This article is part of our complete Saltwater Fish & Reef Guide — your ultimate resource for marine fish, coral care, reef setup, and more.

Zoanthids are one of my favorite soft corals to collect, and I’ve kept them in my reef for years. The color variety is absolutely insane — I’ve seen zoas at Reefapalooza that looked like they were painted by an artist. They’re also very beginner-friendly, which makes them a perfect starting point for new reef hobbyists who want something visually impressive without a steep learning curve.

Reef tank owners, are you looking for a new soft coral to add to your aquarium? If so, zoanthids may be the perfect addition! These beautiful and easy-to-care-for corals are an excellent choice for beginners. In this post we will cover everything you need to know about caring for zoanthids in your reef tank.

A Quick Overview

Origins And Habitat

Zoanthids are very closely related to sea anemones but belong to different taxonomic orders.

Though these corals are extremely common to come across in the ocean and easy to cultivate in a laboratory setting, their species diversity is hardly understood. This can make placing certain species in the correct classification very difficult.

Zoanthid corals can be found in most tropical water ecosystems, including the waters around the Caribbean as well as the Indian and Pacific Oceans¹. That being said, they can be found at all levels of depth and different water temperatures as well.

Interestingly, these corals have adapted to tolerate periods of emersion when the low tide goes out, which can help with collecting and fragging them for the aquarium. At the same time, other zoanthid coral species have been found all the way at the bottom of the ocean on the seafloor at colder temperatures with minimal light.

It is believed that zoanthid corals are epizoic and like to grow on other animals, like sponges.

What Do Zoanthids Look Like?

Since they’re so closely related to sea anemones, zoanthid corals actually look like much smaller anemones! These corals form mats of polyps that individually give way to a colorful head. Zoanthids lack a calcium carbonate skeleton and are referred to as soft corals due to their fleshy structure.

This polyp head has two rows of tentacles on the outer rim and usually has several colors as you work your way into the center towards the mouth. Zoas are sometimes confused with Palythoa spp., but zoanthids are usually smaller, more colorful, and also have shorter tentacles and a rounder mouth.

However, some zoas and palys are impossible to tell apart and so many species are misidentified.

Designer Names

Zoanthids are one of the most modified corals available in the trade, coming in almost all color morphs with varying shapes, sizes, and tentacle lengths. Zoa gardens and collections have become increasingly popular over the past decade, and hobbyists can now find frags costing $5 or upwards of $2000.

There is some controversy surrounding designer zoanthid corals. Many hobbyists believe that a desirable name increases the price of the coral to be much more than it’s actually worth. For the most part, there’s an affordable zoa for everyone.

Here are some of the most popular designer brands you’re likely to come across:

• Rastas – Rasta zoanthids have yellowish-green tentacles, a bluish-purple outer rim with green, orange, and purple moving inward. These zoas tend to be smaller than other color morphs.
• Eagle Eye – These zoas have light green tentacles, with a thin purple margin and center surrounded by orange.
• Fruit Loops – Fruit Loops have bright orange tentacles, with a deep blue center surrounded by yellow.
• Blue Hornets (pictured above) – These corals are one of the darker zoas available. They have neon-green tentacles with an electric blue center. There is a smaller yellow circle surrounding the mouth.
• LA Lakers – These zoas are very similar in appearance to Fruit Loops. LA Lakers have yellow tentacles with a yellow outer rim and dark blue in the center.
• Sunny D. – Sunny D zoanthids have longer purple tentacles that might appear to be lightly frosted. They have a striated center of greens, oranges, and yellows, with a sometimes purple mouth.
• Ultimate Chaos – Ultimate Chaos zoanthids start moving into the next price tier and are usually only sold as one or two polyps at a time. These zoanthids look like mini galaxies with swirls of oranges, yellows, and purples. Ultimate Chaos is one of the larger zoanthids.
• Grandmaster Krak – The Grandmaster Krak is one of the most expensive zoanthids, with normal morphs starting at several hundred dollars with the more collectible varieties going into the thousands. These corals are rich yellows, greens, oranges, and blues with a starburst effect. Typically only one polyp is sold at a time.

Are They Corals Poisonous?

Before introducing one of these corals into your reef tank, this is an important question to consider–and even more important if planning to frag. The problem is that not much is known about palytoxin and it’s hard to tell which corals actually produce it, though it’s mostly associated with those in the Palythoa genus.

Palytoxin is a very dangerous toxin that can be life-threatening depending on exposure; palytoxin poisoning includes flu-like symptoms and skin reactions as well as muscular and cardiac complications.

It is believed that bacteria living within the zoanthid coral polyp are responsible for making the palytoxin as opposed to the coral itself. This toxin can be released underwater as well as above and poses a risk of being inhaled or entering an orifice; consuming plants and animals that have been exposed to palytoxin can also cause poisoning.

However, the chances that your zoas contain palytoxin are minimal. Hobbyists have kept zoas and palys in their tanks for decades with little to no problems. If you’re truly concerned about introducing this toxin into your aquarium, avoid purchasing more natural-looking varieties as it’s believed they are the most likely to be poisonous.

Otherwise, always use protective equipment when working with your tank. Even if you’re not actively touching your zoas, there’s always the chance that they released palytoxin into the water column.

Do not put your hands into the tank with open wounds and wash your hands with soap immediately after. Aquarium gloves, like West Chester 2920, may be appropriate if dealing with especially large colonies. Eye protection, like the 3M Cool Flow mask, is also appropriate if handling the zoanthid coral outside of the tank.

Placement And Temperament In The Aquarium

Even though zoas are one of the most dangerous animals on this planet, they’re not aggressive to other corals in the tank. However, there are a few potential problems that you might run into with having zoas in your aquarium outside of aggression.

The first zoa problem you might have is rapid growth. Some zoas take months to start propagating and then start growing new heads every other day. This is great if you plan on fragging them, but can be a pain if they start growing over your other corals and/or shading out large portions of the tank.

The other main problem with zoas is that they can grow so large and thick that they start to develop dead zones where nutrient transport suffers and algae starts to grow. This will require moving the colony to a higher area of flow, buying new equipment, fragging the colony, or routinely removing debris with a turkey baster.

Are They Easy To Keep?

Though zoas are regarded as one of the easiest corals to keep in the hobby, they are actually the most difficult for many hobbyists. Some hobbyists have zoas that close for months on end without any explanation.

These corals are difficult because each morph requires different lighting, flow, and water parameters.

Corals and Lighting

In general, zoas need moderate lighting (50-150 PAR), but this isn’t to say that hobbyists haven’t kept them way below and way above these numbers.

As mentioned before, zoas are found in extremely shallow waters that are sometimes left exposed when the tide goes out. This means that colonies are receiving tons of light without any moisture relief for extended periods of time. So why do most zoas melt once placed under high lighting then? Well, zoas can be placed under high reef lighting with the right steps.

The secret to getting zoas to be happy under high lighting is proper acclimation. These corals need plenty of time to adjust to new conditions and hobbyists usually move them up in the tank too quickly or too often. Instead, start them at the bottom of your tank and gradually move them up over the course of several months.

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At this point, you may find that your zoas are actually happiest right next to your most demanding small polyp stony corals (SPS). Or, you might find that they start to melt right away with such high light.

For the most part, zoas can also be kept in very low lighting. If you find that your corals are starting to extend upwards, they are probably stretching for light. This is a good indication that it’s time to move them up in the tank.

Otherwise, leave them where they are and try not to move them around too much! Zoas are very temperamental and are used by many hobbyists as a warning coral for being the first to show distress when something is wrong in the tank.

Flow

Getting the water flow right for your zoas can be even more challenging than getting the lighting. Again, your corals will let you know they’re not happy with the conditions they’re in.

As mentioned before, these corals can start to develop dead zones once the colony becomes larger. You will want to make sure that water is being moved past all parts of the coral to ensure that nutrients are being delivered and detritus doesn’t start to build up. However, too much flow can cause your zoas to retract and not open for extended periods of time.

Start by placing your zoas in moderate flow and watch how they react. Move accordingly, but never too much at one time. An adjustable aquarium wavemaker is a great way to generate flow and adjust as needed.

Water Parameters

Here is where zoas can get very tricky. Though standard saltwater conditions are recommended for all zoa varieties, ideal parameters aren’t what some zoas want.

Some hobbyists have found zoas to be very sensitive to pH, alkalinity, and nitrate levels. This can be very frustrating as one colony of zoanthids might be thriving in your tank while the other is quickly melting away.

Unfortunately, this is mostly a game of trial and error of seeing which zoas do best in your system. It is not recommended to change conditions in your tank because of only one coral.

Care And Maintenance

Once you manage to establish a colony of zoas in your aquarium, then there’s not too much work to be done afterward.

These corals can be kept in very low-tech tanks with hang on the back filters, canister filters, or sump filtration. They pull most of the nutrients they need from the water column, so a cleaner tank might not benefit from a protein skimmer.

If keeping larger colonies, then brush off algae as it occurs and regularly flush with water to keep detritus from building up.

Feeding

Zoanthids do not need to be fed. These corals get most of their nutrients through fish waste as well as other detritus that is already available in the water column.

Most hobbyists like to supplement with regular broadcast feedings or more concentrated feedings for enhanced color and faster growth rate. If wanting to feed your coral, do not try to feed larger foods. Instead, feed specific coral foods and other microorganisms, like phytoplankton.

What Are Good Tankmates?

Zoanthids are a great choice for any reef setup. This means that they can happily be housed with saltwater community fish, like clownfish, tangs, and cardinals.

However, zoas can be temperamental and they won’t appreciate fish that might annoy them. This includes species of goby and blenny that regularly rest on rock and corals while swimming around the tank. Though these fish can comfortably be kept with zoas, there’s a chance that you find your corals closed up because your fish is using them as a rest stop!

Similarly, larger invertebrates, like urchins and shrimp, should also be avoided for the same reasons. Large crabs and invertebrates with pincers should not be kept with zoas and colonies have been known to disappear overnight due to a hungry cleanup crew.

Of course, do not keep zoas with any fish that are known to eat corals, like angelfish and parrotfish. This can be especially dangerous if your zoa ends up containing palytoxin and releases it into the water column once injured.

How To Propagate

Propagating zoanthids can be a little intimidating as the threat of palytoxin is always looming. As long as you take precautions with safety equipment, wash your hands, and make sure you don’t have any open wounds, then propagating zoanthids is easy and usually becomes necessary when colonies start becoming too big.

A few tools are recommended for propagating zoanthids, namely bone cutters for cutting rock and a scalpel or scissors for separating the coral from the rock and/or from the rest of the colony. Here is a great video by ReefAmorous showing how to frag Zoas. A simple breakout summary is below.

1. First, break up the rock that the zoas are attached to into smaller, more manageable pieces. If only taking a small part of the colony, then simply move to the next step.
2. Next, use your scalpel or scissor to carefully peel off some of the colony. You will want to be wearing eye protection during this part as liquids can squirt from the cut.
3. These pieces can then be attached to a frag plug with super glue. Don’t be overly concerned with keeping the frags out of water for too long, but try to get them submerged as soon as possible.

How Do You Get Zoas To Spread On Their Own?

Zoanthids are one of the fastest-growing corals in the aquarium hobby. These corals are asexual and one polyp can quickly turn into 50 over the course of a few months.

There is no secret to getting zoas to quickly reproduce. Like any coral, stability is key. If your zoa polyps are fully extended every day and tank conditions are good, then it’s only a matter of time before your zoa colony expands.

Fragging will help spread that colony to other parts of the tank, but the healing process might delay the growth momentarily.

How To Propagate

Zoas can be found in any specialized local fish store. One of the biggest struggles if you are a big coral collector is finding all the designer names locally. Your best bet to find the new and best looking designer zoas is to purchase them online from specialty coral sellers or through auction sites.

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Closing Thoughts

Zoanthids can be the easiest coral you’ve ever kept or one of the hardest. These soft corals don’t require any special care, but their preferred conditions aren’t usually straightforward as they vary with different morphs. They are a great addition to any reef tank, and we hope that you will consider placing these beautiful corals in your own. Leave us a comment below if you have any questions about zoanthids or how they can be cared for properly!

📘 Want to learn more? This article is part of our complete Saltwater Fish & Reef Guide — your ultimate resource for marine fish, coral care, reef setup, and more.