Description
Harlequin Rasbora (Trigonostigma heteromorpha) – Classic Grace with Timeless Appeal
The Harlequin Rasbora is a beloved and iconic schooling fish known for its elegant appearance and peaceful nature. Recognized by the striking black triangular patch on its rosy-copper body, this species adds a touch of refined beauty to any planted aquarium. Native to the calm, tannin-rich waters of Southeast Asia, it flourishes in soft, slightly acidic conditions with gentle lighting and dense vegetation.
Graceful and coordinated when kept in groups, Harlequin Rasboras are a joy to watch as they swim in perfect unison.
Key Features:
-
Latin Name: Trigonostigma heteromorpha
-
Common Name: Harlequin Rasbora
-
Coloration: Rose-gold to copper body with a bold black triangular patch
-
Temperament: Peaceful, graceful, and social
-
Size: Up to 2 inches
-
Tank Requirements: Minimum 10 gallons; soft, slightly acidic water with plants and open space for schooling
-
Diet: Omnivorous—high-quality flakes, micro pellets, and frozen foods like daphnia or mosquito larvae
-
Compatibility: Excellent for peaceful community tanks; best in groups of 6 or more
Tips:
-
A dark substrate and subdued lighting enhance their natural colors.
-
Keep in groups to encourage confident, active behavior.
-
Use live or silk plants to recreate their natural environment.
-
Avoid fin-nipping or aggressive tankmates.
Why Choose This Fish?
The Harlequin Rasbora is a staple of freshwater aquariums for good reason—its iconic look, peaceful nature, and graceful schooling behavior make it a top choice for aquarists seeking beauty, balance, and harmony in a planted tank.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.


