Lambchop Rasbora

The Lambchop Rasbora is a small, peaceful freshwater fish known for its glowing copper-orange body and distinctive black “lamb chop” marking along its side. Active and tightly schooling, this vibrant nano species adds constant movement and color to planted community aquariums.

Temperament: Peaceful
Difficulty Level: Easy
Adult Size: 1–1.5 inches
Lifespan: 3–5 years
Tank Size: 10–20 gallons minimum
Temperature: 73–82°F
pH: 6.0–7.5
Water Hardness: Soft to moderately hard

✔ Keep in groups of 6–10+ (the bigger the school, the better!)
✔ Thrive in planted tanks
✔ Prefer slightly dim lighting
✔ Provide open swimming space
✔ Stable, well-cycled water is important

They feel safest in groups and will display their brightest colors when schooling together.

 Food

Lambchop Rasboras are omnivores and do best on small foods:

• High-quality micro flakes

• Nano pellets

• Baby brine shrimp

• Daphnia

• Finely crushed freeze-dried foods

Feed small portions 1–2 times daily.

Fun Facts

• The black marking resembles a lamb chop — that’s how they got their name!
• Their orange coloration deepens in healthy, stress-free environments.
• They originate from Thailand and Southeast Asia.
• In large schools, they create a shimmering copper effect in planted tanks.