Harlequin Rasbora
Trigonostigma heteromorpha
Water Parameters
About
The Harlequin Rasbora is one of the most popular and recognizable rasboras in the hobby. Its dark triangular mark on an orange‑pink body is unmistakable. It forms beautiful, tight schools, creating an impressive visual effect in planted tanks.
Behavior & Temperament
Extremely peaceful and shy fish. Swims in a tight school in the midwater column. Ideal for planted community aquariums.
Feeding
Omnivore. Accepts flakes, micro pellets, brine shrimp, daphnia and small frozen foods.
Breeding
Oviparous. Spawns on the undersides of broad leaves such as Cryptocoryne. Breeding is difficult in captivity, requiring very soft, acidic water.
Care Notes
Prefers soft, slightly acidic water. Planted aquarium with shaded areas. Moderate lighting. Avoid strong current.
Compatibility
Excellent for peaceful community tanks. Compatible with tetras, corydoras, otos, and other small, calm fish. Avoid large or aggressive fish.
Quick Summary
| Scientific Name | Trigonostigma heteromorpha |
|---|---|
| Family | Cyprinidae |
| Category | Fish |
| Care Level | Beginner |
| Water Type | Freshwater |
| Max Size | 5.0 cm (2") |
| Min Tank | 60 L (16 gal) |
| Min Group | 8+ |
| Diet | Omnivore. Accepts flakes, micro pellets, brine shrimp, daphnia and small frozen foods. |
| Temperament | Extremely peaceful and shy fish. Swims in a tight school in the midwater column. Ideal for planted community aquariums. |
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