FishTankHelper

Lambchop rasbora care: tank size, temperature and tankmates

By Andy · Updated November 6, 2026 · Fish profile

A peaceful copper rasbora with a black lamb-chop shape on its side. Lambchops are easy and look great in a group.

1.2 in
Adult size
10 gal
Smallest tank
73–82°F
Temperature
6+
Group size

Quick facts

TypeRasbora
Adult sizeAbout 1.2 inches
Smallest tank10 gallons
Temperature73–82°F
Keep6 or more
Watch forPeaceful. Keep the right group size.

How to keep them

Keep 6 or more in a planted tank. They eat small flakes and pellets.

Like every fish, they need a cycled tank, a heater set inside their range, and a weekly water change of about 25%. Test for ammonia, nitrite and nitrate before you add them. New to this? Start with how to cycle a fish tank.

Tankmates

Good tankmates

Neon tetra · Cardinal tetra · Ember tetra · Rummynose tetra · Black skirt tetra · Serpae tetra · Harlequin rasbora · Zebra danio · Cherry barb · Tiger barb · Platy · Guppy · Endler's livebearer · Molly · Swordtail · Betta (male) · Honey gourami · Dwarf gourami · Pearl gourami · Corydoras (bronze or peppered) · Pygmy corydoras · Kuhli loach · Otocinclus · Bristlenose pleco · Cherry shrimp · Amano shrimp · Nerite snail · Mystery snail · Glowlight tetra · Black neon tetra · Lemon tetra · Congo tetra · Chili rasbora · Gold barb · Dwarf neon rainbowfish · Sparkling gourami · German blue ram · Bolivian ram · Cockatoo dwarf cichlid · Kribensis · Clown loach · Hillstream loach · Siamese algae eater · Ghost shrimp · Ramshorn snail · African dwarf frog

Possible, with care

Avoid

Not sure about a mix? See the tankmate answers or the stocking ideas by tank size.

Tankmate questions: Can bettas live with lambchop rasboras?

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