Overview
The clown loach comes from the fast, warm rivers of the islands of Borneo and Sumatra in Southeast Asia. It is easy to spot with its bright orange body and three bold black bands, one of which runs right through the eye. Baby clown loaches are the ones you usually see in stores, but do not be fooled, because they grow into big, powerful fish that can reach the length of a ruler and live for decades.
Clown loaches are social animals that feel safe only when they are in a group. In a school they chase, tumble, and rest in piles together. They are famous for two odd habits: they sometimes lie on their side as if they are sick (they are just relaxing), and they can make a soft clicking sound when they are happy or excited.
| Care level | Moderate |
| Adult size | 8-12 in (20-30 cm) |
| Lifespan | 15-20 years |
| Temperament | Peaceful and playful |
| Min. tank | 125 gal (475 L) |
| Temperature | 77-86°F (25-30°C) |
| pH | 6.0-7.5 |
| Diet | Omnivore |
| Schooling | Yes, keep 5 or more |
Water and tank
Because they grow so large and need a group, clown loaches need a very big tank, at least 125 gallons for a proper school of adults. The water should be warm, clean, and gently moving, like the rivers they come from. Keep the tank tightly covered, because loaches are clever and can squeeze out of small gaps.
Aquascape and setup
Give them lots of caves, driftwood, and smooth rocks to explore and hide in during the day. They love to wedge themselves into tight spaces. Use soft sand or fine, rounded gravel so they do not scratch their delicate barbels, the little whiskers they use to taste and feel for food.
Diet
Clown loaches are omnivores that eat almost anything. Feed them sinking pellets, algae wafers, frozen bloodworms, and blanched vegetables like zucchini. They also love snails and will happily crunch them up, which makes them a natural way to control a pest snail problem.
Tankmates and temperament
These loaches are peaceful and get along with many other calm fish, such as tetras, barbs, and rainbowfish. They should never be kept alone or in pairs, because a lonely clown loach becomes shy and stressed. A group of five or more is much healthier and far more fun to watch.
A slow grower
Clown loaches are one of the longest-lived aquarium fish, with some passing 20 years of age. They also grow slowly, so a fish that looks tiny in the store is really a long-term pet that will need a bigger and bigger home as the years go by.
Fun facts
- Clown loaches can make an audible clicking sound with their throat teeth.
- They often rest lying on their side, which can scare new owners who think they are sick.
- A hidden spine sits below each eye and can flick out to defend the fish.
- They are one of the longest-living aquarium fish, sometimes over 20 years.
- In the wild they can grow up to a foot long, much bigger than pet-store babies.
Frequently asked questions
Why does my clown loach lie on its side?
This is normal loach behavior. They flop over to rest and relax, especially near a warm spot or favorite hiding place. As long as the fish is eating and swimming normally, there is nothing wrong.
How many clown loaches should I keep together?
At least five. They are schooling fish and become stressed and hidden when kept alone. A larger group makes them bolder, more active, and much happier.
Do clown loaches really eat snails?
Yes. They love to hunt and crunch small snails, so many aquarists keep them to control pest snails naturally without chemicals.
How big a tank do clown loaches need?
A big one. Because they grow up to a foot long and live in groups, a school of adults needs about 125 gallons or more. They are not a good fish for small tanks.
