Trigonostigma heteromorpha (Harlequin Rasbora) is one of the most popular, elegant, and peaceful schooling fish in the aquarium hobby. With its stunning orange-copper coloration and signature dark wedge-shaped patch along the body, it makes a breathtaking addition to any freshwater tank.

Growing up to 4-5 cm (about 2 inches), these active swimmers thrive best when kept in schools of at least 8-10 individuals. The Harlequin Rasbora is an excellent choice for both beginner and experienced hobbyists, fitting perfectly into community tanks or heavily planted aquascapes.

Key Features:

• Scientific Name: Trigonostigma heteromorpha
• Origin: Southeast Asia (Malaysia, Indonesia, Thailand)
• Size: 4 – 5 cm (1.5 – 2 inches)
• Temperament: Peaceful, ideal for community tanks
• Minimum Tank Size: 60 liters (approx. 15 gallons) for a school
• Water Parameters: Temp 22-28°C (72-82°F); pH 6.0 – 7.5; dGH 2 – 12

Diet:

Harlequin Rasboras are omnivorous and easy to feed. They readily accept high-quality flake foods, micro pellets, as well as frozen or live foods such as brine shrimp, daphnia, and cyclops.

Care Tips:

To display their best colors, keep them in a well-planted aquarium with subdued lighting, dark substrate, and open swimming areas in the middle. They make great tank mates for small tetras, corydoras, dwarf cichlids, and other peaceful community fish.