Species Profile
Harlequin Rasbora
Trigonostigma heteromorpha
Rasboraspeaceful
Adult size
2″
Minimum tank
15 gal
Temperature
72–81°F
pH
6–7.5
Schooling
Group of 6+
Water level
mid
Diet
Flake, small pellets
Notes
Classic peaceful schooler from southeast Asian peat swamps, recognizable by the black wedge on the rear half. Hardy enough for beginners but happiest in soft acidic blackwater. Group of 8+ produces a noticeable shimmer.
Photo: Vassil / Wikimedia Commons · Source · CC0-1.0