Harlequin Rasbora
Trigonostigma heteromorpha
Harlequin Rasbora is a peaceful middle-to-top swimmer.
Save this fish or add it directly to one of your aquariums.
Quick facts
- Adult size
- ≤ 5 cm (≤ 2 in)
- Aquarium size
- 60 L or larger / ≥ 60 cm (≥ 23.6 in) minimum length
- Care level
- Beginner – Intermediate
- Temperament
- Peaceful
- Swimming zone
- Middle to top swimmer
- Temperature
- 22–28 °C
- pH
- 6–7
- GH
- 2–15 dGH
- Diet
- Omnivore
- Lifespan
- up to 8 years
Care requirements
Care level: Beginner – Intermediate.
Lifespan: up to 8 years.
Aquarium size and space needs
Minimum aquarium size: 60 L or larger / ≥ 60 cm (≥ 23.6 in) minimum length. Plan the layout and stocking within that limit.
Water parameters
Suitable water: temperature 22–28 °C, pH 6–7, GH 2–15 dGH.
Temperament and compatibility
Harlequin Rasbora is peaceful and suits calm community fish.
Swimming zone and behavior
This fish uses the middle to upper part of the aquarium, so leave enough open swimming space for movement and feeding.
Feeding
As an omnivore, Harlequin Rasbora should receive a varied diet rather than one repeated food type.
Natural habitat and origin
Origin: Malaysia Singapore Indonesia.
Before adding this fish
- Plan for an aquarium of 60 L or larger / ≥ 60 cm (≥ 23.6 in) minimum length.
- Avoid aggressive or highly competitive fish.
- Offer a varied diet that matches this species.
Similar fish profiles
Use these profiles to compare fish with similar care level, size, temperature range, or swimming behavior.
FAQ
How large does Harlequin Rasbora get?
Harlequin Rasbora reaches ≤ 5 cm (≤ 2 in).
What aquarium size does Harlequin Rasbora need?
Use an aquarium of at least 60 L or larger / ≥ 60 cm (≥ 23.6 in) minimum length.
Is Harlequin Rasbora peaceful?
Yes. Harlequin Rasbora is recorded as peaceful and is best planned with calm community fish that do not harass it or dominate the feeding area.
What temperature is suitable for Harlequin Rasbora?
Keep it between 22 to 28 °C.