Types of Loaches: Complete Guide to Every Loach Species for Your Aquarium

Loaches are some of the most fascinating, personality-driven fish in the freshwater hobby. I have been keeping and studying these bottom-dwellers for over 25 years, and they never stop surprising me. From the playful antics of Clown Loaches to the quirky burrowing behavior of the Horseface Loach, this group offers something for every type of aquarist.

The fish we call “loaches” span several families. The Botiidae family includes the bold, colorful species like Clown Loaches and Yoyo Loaches that most hobbyists picture first. Cobitidae covers the eel-shaped kuhli loaches and the cold-tolerant Dojo Loach. Gastromyzontidae (sometimes grouped under Balitoridae) contains the flat-bodied hillstream loaches built for fast-flowing water. Nemacheilidae rounds out the group with stream-dwelling species like the Sumo Loach and Zodiac Loach. Despite the family differences, all loaches share a few things in common: they are scaleless or have very reduced scales, they possess barbels around the mouth, and most are bottom-oriented fish that appreciate hiding spots.

Whether you are shopping for a snail-eating workhorse, a peaceful nano species for a planted tank, or a high-flow hillstream oddball, this A-Z directory covers every loach species we have profiled at Aquarium Store Depot. Click any linked name to read the full care guide, and check back as we continue adding new species.

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A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

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B

• Bengal Loach (Botia dario) — Colorful botiid loach with bold golden and dark blue-gray bands. Size: 6 inches (15 cm) | Temperament: Semi-Aggressive | Min Tank: 30 gallons
• Black Kuhli Loach (Pangio oblonga) — Solid chocolate-brown variant of the kuhli family, equally secretive and peaceful. Size: 4 inches (10 cm) | Temperament: Peaceful | Min Tank: 15 gallons
• Blue Botia (Yasuhikotakia modesta) — Large, powerful loach with subtle blue-gray coloring and a reputation for aggression. Size: 10 inches (25 cm) | Temperament: Aggressive | Min Tank: 75 gallons

C

• Chinese Hillstream Loach (Beaufortia kweichowensis) — Flat-bodied sucker loach built for fast-flowing, oxygen-rich streams. Size: 3 inches (8 cm) | Temperament: Peaceful | Min Tank: 20 gallons
• Clown Loach (Chromobotia macracanthus) — The king of loaches with bold orange and black bands, massive personality, and a 20+ year lifespan. Size: 12 inches (30 cm) | Temperament: Peaceful | Min Tank: 125 gallons

D

• Dojo Loach (Misgurnus anguillicaudatus) — The weather-predicting eel-shaped loach that thrives in cooler water and tolerates beginner mistakes. Size: 10 inches (25 cm) | Temperament: Peaceful | Min Tank: 55 gallons
• Dwarf Chain Loach (Ambastaia sidthimunki) — Tiny, active loach that swims in the midwater column rather than hiding on the bottom. Size: 2.5 inches (6 cm) | Temperament: Peaceful | Min Tank: 20 gallons

G

• Gold Zebra Loach (Botia histrionica) — Striking botiid with bold dark and gold banding, active and social in groups. Size: 5 inches (12 cm) | Temperament: Semi-Aggressive | Min Tank: 40 gallons

H

• Hillstream Loach (Sewellia lineolata) — Flat, disc-shaped loach built for high-flow environments with intricate spotted patterns. Size: 3 inches (8 cm) | Temperament: Peaceful | Min Tank: 20 gallons
• Horseface Loach (Acantopsis choirorhynchos) — Long-snouted burrower that spends most of its time buried in sand substrate. Size: 8 inches (20 cm) | Temperament: Peaceful | Min Tank: 55 gallons
• Hovering Zebra Loach (Yunnanilus cruciatus) — Tiny nano loach that hovers in the water column with a distinctive dark-striped pattern. Size: 1.5 inches (4 cm) | Temperament: Peaceful | Min Tank: 10 gallons

J

• Java Loach (Pangio semicincta) — Close relative of the kuhli loach with shorter, more widely spaced bands. Size: 3 inches (8 cm) | Temperament: Peaceful | Min Tank: 15 gallons

K

• Kuhli Loach (Pangio kuhlii) — The eel-shaped noodle fish beloved for its nocturnal personality and orange-and-brown striped body. Size: 4 inches (10 cm) | Temperament: Peaceful | Min Tank: 15 gallons

L

• Lizard Loach (Homaloptera orthogoniata) — Flat-bodied stream loach with lizard-like appearance and high oxygen demands. Size: 5 inches (12 cm) | Temperament: Peaceful | Min Tank: 30 gallons

P

• Panda Loach (Yaoshania pachychilus) — Striking black-and-white hillstream species from China that demands cool, fast-flowing water. Size: 2.5 inches (6 cm) | Temperament: Peaceful | Min Tank: 20 gallons
• Polka Dot Loach (Botia kubotai) — Eye-catching botiid covered in yellow spots on a dark body, social and active. Size: 5 inches (12 cm) | Temperament: Semi-Aggressive | Min Tank: 40 gallons

R

• Reticulated Hillstream Loach (Sewellia sp.) — Intricate net-like pattern variant of the hillstream loach family. Size: 2.5 inches (6 cm) | Temperament: Peaceful | Min Tank: 20 gallons
• Rosy Loach (Petruichthys sp. ‘rosy’) — Tiny, colorful nano fish marketed as a loach, perfect for small planted tanks. Size: 1.25 inches (3 cm) | Temperament: Peaceful | Min Tank: 10 gallons

S

• Skunk Loach (Yasuhikotakia morleti) — Sleek loach with a bold dark stripe from nose to tail and a feisty attitude. Size: 4 inches (10 cm) | Temperament: Semi-Aggressive | Min Tank: 30 gallons
• Sumo Loach (Schistura balteata) — Chunky, boldly patterned stream loach with territorial tendencies. Size: 3.5 inches (9 cm) | Temperament: Semi-Aggressive | Min Tank: 20 gallons

Y

• Yoyo Loach (Botia almorhae) — Energetic, snail-eating loach with distinctive Y-O-Y-O-like markings along its flanks. Size: 6 inches (15 cm) | Temperament: Semi-Aggressive | Min Tank: 40 gallons

Z

• Zebra Loach (Botia striata) — Small, peaceful botiid with thin vertical stripes and a calm temperament for a botia. Size: 4 inches (10 cm) | Temperament: Peaceful | Min Tank: 30 gallons
• Zodiac Loach (Mesonoemacheilus triangularis) — Beautifully patterned stream loach from India with bold geometric markings. Size: 4 inches (10 cm) | Temperament: Semi-Aggressive | Min Tank: 20 gallons

Species Coming Soon

We are actively working on care guides for more loach species. Loach taxonomy is spread across multiple families, and the hobby continues to discover new species, especially in the hillstream and nemacheilid groups. Check back as we continue expanding this directory with detailed care guides for each species.

Frequently Asked Questions

Are loaches good community fish?

Most loaches do well in community tanks, but it depends on the species. Peaceful options like Kuhli Loaches, Hillstream Loaches, and Dwarf Chain Loaches mix well with tetras, rasboras, and other calm tankmates. Botiid loaches like Yoyo Loaches and Clown Loaches can be semi-aggressive and do best with fish that can handle a little roughhousing. Always research the specific species before adding one to your tank.

Do loaches need to be kept in groups?

Yes, almost all loaches are social fish that should be kept in groups of at least 5 to 6. Keeping them solo or in pairs often leads to stress, hiding, or aggression. When kept in a proper group, loaches are far more active, confident, and fun to watch. The main exception is the Horseface Loach, which is more solitary by nature.

Will loaches eat snails?

Many botiid loaches are excellent snail eaters. Yoyo Loaches, Clown Loaches, Zebra Loaches, and Dwarf Chain Loaches are all popular choices for controlling pest snail populations. Kuhli loaches and hillstream loaches, on the other hand, generally leave snails alone. If snail control is your goal, a group of Yoyo or Dwarf Chain Loaches is usually the most practical option for a standard community tank.

What substrate is best for loaches?

Sand is the go-to substrate for most loaches. Kuhli loaches and Horseface Loaches love to burrow, and sharp gravel can damage their barbels and soft underbellies. Even botiid loaches that do not burrow still spend a lot of time foraging along the bottom, so a smooth sand or fine gravel substrate protects them and encourages natural behavior. Hillstream loaches are the exception. They do fine on smooth river rocks and gravel that mimic their natural stream habitat.

How long do loaches live?

Loaches are surprisingly long-lived compared to many tropical fish. Kuhli Loaches commonly reach 10 years in captivity, and Clown Loaches can live over 20 years with proper care. Even smaller species like Dwarf Chain Loaches and Zebra Loaches typically live 8 to 12 years. This long lifespan is something to plan for, especially with larger species that need big tanks for their entire lives.

Closing Thoughts

Loaches are one of those groups that hook you once you keep your first one. They have more personality than most fish twice their size, and watching a group of them interact is endlessly entertaining. Whether you go with a classic like the Kuhli Loach or take on a project species like the Panda Loach, the key is always the same: give them the right group size, the right substrate, and plenty of hiding spots. Do that, and your loaches will reward you with years of fascinating behavior.

This directory will continue to grow as we publish new care guides. If there is a loach species you want us to cover next, drop a comment below and let us know.

References

• Botia Species List — FishBase
• Pangio Species List — FishBase
• Botia Genus Overview — Seriously Fish
• Pangio Genus Overview — Seriously Fish
• Loach Articles — Practical Fishkeeping