More info
Datasheet
| Minimum Tank Size | 60 litres / 15.85 US gallons |
| Maximum Size | 4.5cm / 1.77inches |
| Temperature | 21°C / 69.80°F - 28°C / 82.40°F |
| Hardness | 1.01dgH / 18ppm - 12.05dgH / 215ppm |
| pH | 5.0-7.5 |
Behaviour
The Harlequin Rasbora is known for its peaceful nature, making it an excellent addition to a well-maintained community tank, especially for beginners in fishkeeping. They do not have specific water chemistry requirements, allowing them to be compatible with a variety of popular fish species. This schooling fish thrives best when kept in groups of at least 8-10 individuals. Maintaining them in larger numbers not only reduces their nervousness but also enhances their natural behavior and color display as males compete for female attention.
Feeding and Diet
In their natural habitat, the Harlequin Rasbora feeds on small insects, worms, crustaceans, and zooplankton. In an aquarium setting, they readily accept a diet of small live and frozen foods such as bloodworms, Daphnia, and Artemia, supplemented with high-quality dried flakes and granules. Regular feeding is essential to keep them healthy and vibrant.
Reproduction & Dimorphism
The Harlequin Rasbora does not exhibit parental care, and spawning occurs differently compared to other small cyprinids. The eggs are attached to the underside of broad plant leaves or other objects. Breeding them in a densely-planted and dimly-lit tank can result in successful spawns. Sexual dimorphism is visible in mature females, who are typically larger and rounder-bellied than the more colorful males.
Habitat and Distribution
Native to southern Thailand, Peninsular Malaysia, Singapore, and the Greater Sunda islands of Borneo and Sumatra, the Harlequin Rasbora inhabits gently flowing forest streams with thick submerged aquatic vegetation. They are found in areas with soft, weakly acidic to neutral water, typically tinted with tannins from decomposing organic matter. Collection locality may influence their appearance, with variations noted in fish from different regions. Wild-caught specimens are rare in the aquarium trade due to commercial breeding practices.