Blue-lined Rasbora (Trigonopoma gracile)

Family: Cyprinidae

Blue-lined Rasbora — a Cyprinidae from Borneo, mostly peaceful community fish. Reaches 4.1–6.1 cm; singly or in small groups depending on temperament. 22–24 °C.

Care parameters

Water temperature
22–24 °C
pH
6.5–7
GH hardness
5–12 dGH
Adult length
4.1–6.1 cm
Minimum tank
45 L
Water layer
Bottom-dwelling
Difficulty
Moderate
Temperament
Mostly peaceful community fish
Origin
Borneo

Species overview

From the waters of Borneo comes Trigonopoma gracile, a member of the family Cyprinidae. A adaptable species that forgives beginner mistakes more readily than most. It lives on the bottom. Adults reach 4.1–6.1 cm. Singly or in small groups depending on temperament. Give it clean water and room to behave naturally, and it will largely care for itself. Maintain 22–24 °C at pH 6.5–7. A solid choice for a well-planned community tank.

Native biotope

Habitat
Clear streams and rivers over gravel
Flow
Moderate, well-oxygenated current
Dissolved O₂
Appreciates well-oxygenated water

Aquascape & hardware

Substrate
Fine gravel and sand
Hardscape
Water-worn stones and driftwood
Plants
Hardy rooted plants along the margins

Temperament, diet & tankmates

Schooling
Singly or in small groups depending on temperament
Diet
Accepts quality flakes, granules and frozen foods
Recommended tankmates
  • Similar-sized peaceful community fish — Compatible size and temperament
Avoid keeping with
  • Fin-nippers — Constant stress

Breeding & notes

Sexual dimorphism
Males often slimmer and more colourful
Breeding method
Egg-scatterer; no parental care