Trigonostigma heteromorpha
Harlequin Rasbora
A classic community fish, Harlequin Rasboras are peaceful, colorful, and hardy. They show their best colors when kept in large schools and against a dark background with plants.
Ensure perfect water for Harlequin Rasbora ➔
Perfect for Aquaware Monitoring
Note: Requires Stability
Avoid stress caused by fluctuating parameters. To boost the immune system, smart monitoring (e.g., with Aquaware) is the best path to long-term health.
Temperature
22 - 27 °C
72 - 81 °F
pH Value
6.0 - 7.5 pH
Acidity Level
Mineral Content (TDS)
50 - 200 ppm
✅ Ideal for Aquaware Sensor
Did you know?
They lay their eggs on the underside of broad-leaved plants like Cryptocoryne.
Aquaware Pro Tip
Keep them with other peaceful community fish like Tetras or Corydoras for a harmonious tank.
Natural Habitat
Peat swamp forests and shaded forest streams in Malaysia, Thailand, and Sumatra.
Diet & Nutrition
Omnivore. Fine flakes, micro-pellets, and small frozen foods like daphnia.
Behavior
Peaceful schooling fish. Best kept in groups of 8 or more.
Max Size
4-5 cm (1.5-2 inches)
Average adult size
Lifespan
5-6 years
Years with proper care
Swim Zone
Preferred tank region
Top 🐟
Mid 🐟
Bottom
Min. Tank
40 Liters
Recommended minimum size
Social
8 Fish
Schooling fish (Minimum!)
Add. Space
5 L
Required per additional fish
(1 Gallons)
(1 Gallons)
💧 +5 Liters needed