Description
Purple Harlequin Rasbora – Trigonostigma heteromorpha
Introduction:
The Purple Harlequin Rasbora (Trigonostigma heteromorpha), known for its distinctive purple hue and striking black triangular patch, is a beautiful and peaceful schooling fish. Growing up to 1.5-2 inches (4-5 cm), it makes an excellent addition to small and medium-sized community aquariums, adding a splash of color and dynamic movement to planted tanks. Its hardy nature and adaptability make it a popular choice for aquarists of all experience levels.
1. Natural Habitat and Behavior
Originating from Southeast Asia, specifically Thailand, Malaysia, and Sumatra, the Purple Harlequin Rasbora inhabits slow-moving waters rich in vegetation. These fish are accustomed to soft, slightly acidic waters with shaded areas. In the aquarium, they display peaceful schooling behavior, preferring to swim together in the middle levels of the tank. Their tranquil disposition and striking colors make them a wonderful choice for community aquariums.
2. Aquarium Setup
A group of Purple Harlequin Rasboras can be comfortably housed in a 20-gallon tank, although a larger tank will allow them more space to school. They thrive in well-planted tanks with areas of open swimming space and dim lighting to mimic their natural environment. Optimal water parameters include a pH of 6.0-7.0 and a temperature between 72-78°F (22-25°C). A dark substrate can enhance their coloration, and gentle filtration is preferred to avoid strong water currents.
3. Diet and Feeding
Purple Harlequin Rasboras are omnivorous and will eat a variety of foods. High-quality flakes and pellets form a good base for their diet, supplemented with live or frozen foods like brine shrimp, daphnia, and bloodworms. Feeding them twice daily in small portions will support their health and encourage active behavior.
4. Compatibility with Other Fish
These peaceful fish are ideal tank mates for other small, non-aggressive species such as tetras, small barbs, danios, corydoras, and other rasboras. Keeping them in groups of 6 or more is recommended, as they are social and will display natural schooling behaviors in larger groups. They are not suited for tanks with large or aggressive species, as they may become stressed or bullied.
5. Common Challenges and Tips
- Schooling Needs: Like other rasboras, Purple Harlequins are happiest in groups. Keeping them in small numbers may cause them to become shy or stressed.
- Water Quality: They are sensitive to poor water conditions, so regular water changes are important for maintaining water quality.
- Tank Cover: Ensure the tank has a secure lid, as these rasboras may occasionally jump, especially if startled.
Conclusion
The Purple Harlequin Rasbora (Trigonostigma heteromorpha) is a peaceful and visually appealing fish, well-suited for planted community tanks. With their stunning color and easygoing nature, they bring beauty and balance to a variety of aquarium setups. This hardy fish is a fantastic choice for aquarists looking for a low-maintenance yet vibrant addition to their tank.
