Black Harlequin Rasbora

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Trigonostigma heteromorpha

Purple-black body with tan accents on head and fins

Growth Size
2" | 5 cm

Minimum Tank Size
10 Gal. | 38 L

Care Level

Omnivore; quality flake food, bloodworms, and tubifex


Harlequins should be housed in schools of at least six individuals, and can peacefully coexist in community tanks with other small fish species of similar temperament. They require a well-aquascaped planted tank that is well established.

* Sizes vary, please contact for details.

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Into the Blue signifies a passion for education and sustainability. We believe providing environmentally friendly alternatives to purchasing wild stock in the hopes of helping our industry and revolutionizing aquaculture.

Our Suppliers

As part of our commitment to quality, Into the Blue fish undergo vigorous screening by qualified marine specialists to ensure only the healthiest species are delivered to our customers. Fish are treated in premium grade facilities for internal and external parasites, including flukes, lice, nematodes, cryptocaryon, brooklynella hostiles, velvet disease, hole in the head and more. This helps ensure the best success rate in your aquarium environments. Less stress on the fish, the environment, and on you!