Black Harlequin Rasbora

Black Harlequin Rasbora brings rich, dark coloration and lively group movement to a planted aquarium. This ornamental form of Trigonostigma heteromorpha makes an attractive choice for a peaceful freshwater community.

Size and temperament

Adult body length reaches approximately 4.5 cm, excluding the tail. Peaceful and social, these fish should be kept in a group of at least 8–10 for confidence and a natural display.

Aquarium care

Provide an aquarium with a base of at least 60 × 30 cm, plants, shaded areas, and open swimming space. Dark substrate and subdued lighting complement their coloration. Maintain clean, stable water with regular partial water changes.

• Temperature: 21–28°C / 70–82°F
• pH: 5.0–7.5
• Hardness: 1–12 dGH

Feeding

Offer small flakes or microgranules, supplemented with appropriately sized frozen or live brine shrimp, daphnia, and bloodworms.

Tank mates

Choose peaceful, similarly sized fish with compatible water requirements, such as small tetras, other rasboras, Corydoras, and small loaches. Avoid large predators and aggressive fish.

Ordering

Listed size: 2–2.5 cm. Price: $7 per fish. Purchase size is not adult size. Contact Las Vegas Exotic Fish to confirm availability. Individual coloration may vary.