Aquarium species profile

Harlequin Rasbora

Trigonostigma heteromorpha · Southeast Asia (Malaysia, Sumatra, Thailand)

Minimum tank10 gal

Adult size2"

Care levelEasy

TemperamentPeaceful

Temperature73–82°F

pH range6.0–7.5

Diet

Omnivore – micro pellets, flake food, frozen daphnia, baby brine shrimp

Compatible tank mates

Tetras, Corydoras, Gouramis, Bettas, dwarf cichlids

Tank mates to avoid

Large predatory fish, very aggressive species

Care notes

Iconic black triangle marking on copper body. Schooling; keep in groups of 8–10 for best display. Hardy and adaptable.

Check the whole aquarium. Tank size alone does not establish compatibility. Confirm adult size, water overlap, social grouping, territory, diet, and the individual animals before stocking.

Check compatibility in Fishician