Harlequin Rasbora Tropical Fish Information

Trigonostigma heteromorpha
Harlequin Rasbora
Behaviour Peaceful, shoaling
Typical size 3cm
Max size 5cm
Tank Area Middle, all
Min Tank Size 60cm
Min Number in Tank 6
Temp Min: 22℃ Max: 26℃
Feeding Flake, frozen, live foods
pH Range 5-8
Hardness vs,s,m,h
Harlequin Rasbora Trigonostigma heteromorpha
  • Harlequin Rasbora Trigonostigma heteromorpha - thumbnail
  • Harlequin Rasbora Trigonostigma heteromorpha - thumbnail

Harlequin Rasbora (Trigonostigma heteromorpha)

Harlequin Rasbora Tropical Fish Learn all about the Harlequin Rasbora's feeding habits and food types, its behaviour, its origins, its natural habitats, is it male or female, breeding advice and information, suitable tank mates, its sizing and growth range, minimum tank size, water PH and more. Use our fish community creator tool to plan your tank set up and ensure that the Harlequin Rasbora is the right fish for your aquarium.

The Harlequin is a popular aquarium fish and ideal for a community of other small, peaceful fishes. Harlequins are shoaling fish and need to be kept in groups, ideally in aquariums with densely planted areas and plenty of hiding spots. Over time the body shape deepens and older fish often exhibit a high-backed shape. Good water quality is required for long-term health and the fish prefer slightly soft, acidic water. A good aquarium fish for planted tanks or peaceful communities. Harlequins also make good tank-mates for timid or nervous fish.

Harlequin Rasbora Facts

Family Cyprinidae (Minnows & Carps) | Synonyms Rasbora heteramorpha, R. heteromorpha | Other names Red rasbora | Origin Asia; Thailand, Sumatra | Breeding Open water egg scatterers | Natural Water Conditions pH 5-7, very soft to medium | Natural Habitat Forest streams | Sexing Males are thinner. The black marking on the body extends at the bottom on males; on females the edge is flat

Harlequin Rasbora Help and Advice

If you have a question about keeping Harlequin Rasbora's then please use our Harlequin Rasbora help forum. Join 100's of other fish enthusiasts with 1000's of years experience between them caring for and keeping fish like these.

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Check tank mates for the Harlequin Rasbora fish species

You are in the thinkfish community creator for the Harlequin Rasbora fish species, you can learn all about how the tool works in assessing fish tank mate compatibility at the link provided or use the tool tips provided to guide you. Create a test fish community that includes the Harlequin Rasbora species and any other types of fish or crustacean you'd like to introduce - You can assess the best companions, tank size suitability, stocking levels based on filter type and volume and possible negative interactions and warnings as you build up your aquarium.

Please do check your water type for compatibility with your fish, which can be found on the Harlequin Rasbora information box above and your local water company providers website. Don't waste your money and endanger your fish!
Tank Details
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