Harlequin Rasbora (Size M)

Scientific Name: Trigonostigma heteromorpha

The Harlequin Rasbora is a classic freshwater schooling fish known for its warm copper-orange coloration and distinctive black triangular marking along the rear half of the body. Their attractive coloration, peaceful temperament, and active schooling behavior make them an excellent choice for planted aquariums and peaceful community tanks.

Harlequin Rasboras are social fish and should be maintained in groups, where they display more natural behavior and create an active school through the middle and upper areas of the aquarium. They are relatively hardy and adaptable when provided with stable water conditions, making them suitable for both newer and experienced freshwater aquarists.

Care Level: Easy
Temperament: Peaceful / Active / Schooling
Adult Size: Approximately 1.5–2 inches
Minimum Tank Size: 15 gallons recommended
Temperature: 73–82°F
pH: 6.0–7.5
Diet: Omnivore
Recommended Group Size: 8 or more

Recommended Setup: A mature, well-filtered aquarium with plenty of open swimming space combined with live plants, driftwood, and other areas of cover. Harlequin Rasboras look especially attractive in planted aquariums with darker substrate and subdued areas of lighting. Keep them in a school of at least 8 whenever possible and pair them with similarly peaceful community fish. Feed a varied diet of quality small flakes or micro pellets supplemented with appropriately sized frozen or live foods.

Please Note: Live fish naturally vary in size, sex, coloration, markings, and overall appearance. Male and female fish are selected at random, and a specific sex or ratio cannot be guaranteed. The fish you receive may not look exactly like the individual pictured.

All livestock from Felipe’s Fish is carefully selected and prepared for safe transport. Please review our shipping and Live Arrival Guarantee policies before ordering.