Harlequin Rasbora

🔥 Harlequin Rasbora (Trigonostigma heteromorpha)

Add timeless beauty and effortless movement to your aquarium with the iconic Harlequin Rasbora. Instantly recognisable by its copper-orange body and bold black triangular patch, this peaceful schooling fish is one of the most popular choices for planted and community aquariums worldwide.

Hardy, calm, and visually striking in groups, Harlequin Rasboras are perfect for both beginners and experienced aquarists looking for a reliable, attractive shoaling fish.

🌿 Why Choose Harlequin Rasbora?

🟠 Striking copper-orange body with black “harlequin” marking
🐠 Peaceful and reliable schooling fish
🌱 Perfect for planted and aquascaped aquariums
🧘 Calm community-friendly temperament
⭐ One of the most popular rasboras in the UK

When kept in groups, Harlequin Rasboras form a tight, coordinated shoal that glides through the aquarium, adding constant movement and harmony.

📏 Care Requirements

🧬 Scientific Name: Trigonostigma heteromorpha
📛 Common Name: Harlequin Rasbora
🏠 Tank Size: 50L+ recommended
🌡️ Temperature: 22–28°C
⚗️ pH Range: 5.5–7.5
🧘 Temperament: Peaceful
🍽️ Diet: Flakes, micro pellets, frozen & live foods
👥 Group Size: 8–10+ recommended

Harlequin Rasboras thrive in well-planted aquariums with gentle flow and slightly subdued lighting, which enhances their warm coloration and natural behaviour.

🐠 Compatibility

Ideal for peaceful community aquariums. They pair well with tetras, Corydoras, small gouramis, shrimp, and other rasboras. Avoid aggressive or fin-nipping species.

Important Notes

Harlequin Rasboras are very hardy and beginner-friendly, but always perform best in stable, well-maintained aquariums. Keeping them in larger groups encourages natural schooling and reduces stress.

The Harlequin Rasbora is a perfect choice for UK aquarists looking for a dependable, peaceful, and beautifully patterned schooling fish that thrives in planted and community aquariums.