The Wrestling Halfbeak (Dermogenys pusilla) is a fascinating and active freshwater fish known for its elongated body and distinctive jaw structure. Native to Southeast Asia, including rivers, streams, and estuaries in Indonesia, Malaysia, and Thailand, this species is popular among aquarists for its unique behavior and surface-dwelling habits.

Wrestling Halfbeaks grow to about 2 to 3 inches in length and are known for their long, upward-pointing lower jaws, which they use to skim insects from the water surface. They are peaceful but can be territorial, especially males, who may “wrestle” in displays of dominance—hence their common name.

These fish are surface dwellers and do best in aquariums with a calm surface, floating plants, and open swimming areas. A tank with a secure lid is important, as they are known to jump. Adding live plants or driftwood helps replicate their natural habitat and provides cover for shy individuals.

Ideal water conditions include a temperature of 75°F to 82°F, slightly acidic to neutral pH of 6.5 to 7.5, and moderate water hardness. Clean, well-oxygenated water with regular maintenance is important for their health.

Wrestling Halfbeaks are omnivorous and prefer live or frozen foods such as brine shrimp, daphnia, and mosquito larvae. They may also accept high-quality flake or micro-pellets designed for small surface-feeding fish. Feeding at the surface encourages natural hunting behavior and keeps them healthy.

While they are generally peaceful, male Wrestling Halfbeaks may display mild aggression toward each other, so keeping one male with multiple females is recommended. They can also be housed with other small, non-aggressive fish that occupy different areas of the tank.

Wrestling Halfbeaks are hardy, active, and visually interesting fish that add movement and personality to a community aquarium. With proper care, they can live up to 4 to 5 years, providing an engaging addition to any aquarist’s collection.