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Harlequin Gold (Rasbora heteromorpha gold)
23–28°C · pH 6–7.5 · 60L
£5.99
Black Harlequin Rasbora is a peaceful planted-aquarium shoaling fish with the classic wedge marking in a darker strain. Best kept in groups of 8+, with. Live Arrival Guarantee plus licensed live-animal courier support service.
Adult size is the maximum length this species reaches at full maturity (scientific sources). The livestock you receive will be younger and smaller — pick a size variant above for the actual shipping size. Photos are AI-enhanced, so the animal may show subtle colour or marking differences.
Trigonostigma heteromorpha
Black Harlequin Rasbora are a shoaling species — they need 6+ to feel safe and show their full colour.
Black Harlequin Rasbora is a peaceful planted-aquarium shoaling fish with the classic wedge marking in a darker strain. Best kept in groups of 8+, with. Live Arrival Guarantee plus licensed live-animal courier support service.
Adult size is the maximum length this species reaches at full maturity (scientific sources). The livestock you receive will be younger and smaller — pick a size variant above for the actual shipping size. Photos are AI-enhanced, so the animal may show subtle colour or marking differences.
Harlequin rasboras are stunning copper-orange shoaling fish with a distinctive black triangle marking. Peaceful, hardy, and perfect for planted community tanks.
Maintain these water conditions for optimal health and vibrant colors
Black Harlequin Rasbora (Trigonostigma heteromorpha) is a darker strain of the classic Harlequin Rasbora, loved for its wedge-shaped marking, calm shoaling behaviour and planted-aquarium presence. It is a peaceful midwater fish for stable community aquariums, especially where plants, subdued cover and a proper group help the shoal settle.
| Listed identity | Trigonostigma heteromorpha Black Harlequin strain |
|---|---|
| Adult size | About 4-5cm |
| Minimum aquarium | 60 litres or larger |
| Water | 22-26°C, pH 5.0-7.0, soft to moderate hardness |
| Diet | Quality flakes, micro pellets and small frozen foods |
| Temperament | Peaceful shoaling fish |
Keep at least eight, with more giving better confidence and tighter shoaling. Gentle filtration, plants and open midwater swimming space suit them well. Avoid boisterous or fin-nipping tank mates that can scatter the group.
Use as a first-time buyer. This live fish is packed for a licensed live-animal courier service and covered by the Tropical Fish Co Live Arrival Guarantee.
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