Harlequin Rasbora
Trigonostigma heteromorpha · family Danionidae
Parameters
- Temperature
- 22–28 °C
- pH
- 5–7
- Hardness
- 1–12 °dGH
- Tank volume
- from 60 L
- Maximum size
- up to 5 cm
- Group size
- min 8, ideal 10
- Temperament
- Peaceful
- Swimming zone
- Middle
- Difficulty
- Beginner
- Lifespan
- 5–8 years
Description
Instantly recognizable black wedge mark on an orange-pink body. Schooling, peaceful, hardy — a great alternative to neon tetras.
Care
Soft acidic water is preferred but it tolerates medium water.
Feeding
Omnivore.
Compatibility
Compatibility data not yet available.
FAQ
- Are harlequin rasboras schooling?
- Strongly so — keep at least 8. In smaller groups they fade and hide.
AuthorGoldie Editorial
Goldie editorial team
Practising aquarists with a combined 30+ years of experience · Biologists and editors, fact-checking against FishBase and Seriously Fish · Every piece is reviewed by a qualified ichthyologist before publication
Reviewed byGoldie Science Board
Scientific board — ichthyologists and veterinarians
Ichthyologists and veterinarians with university degrees · Reference FishBase, Seriously Fish and peer-reviewed literature · Sign every reviewed article with their credentials shown
Sources
- Wikipedia: Trigonostigma heteromorpha · Wikipedia · 2026-05-22