The Rummynose Tetra, scientifically known as Hemigrammus bleheri, is a popular freshwater fish species among aquarium enthusiasts. Its vibrant coloration and distinctive markings make it a visually captivating addition to any community tank. This article will delve into the characteristics, care requirements, behavior, and breeding of the Rummynose Tetra, shedding light on why it remains a favored choice for hobbyists worldwide.



The Rummynose Tetra is a small-sized fish, reaching an average length of about 1.5 inches (4 cm). Its body is relatively streamlined and laterally compressed, giving it an elegant appearance in the aquarium. The most prominent feature of the Rummynose Tetra is its striking red nose, which extends to the forehead, contrasting with a pearlescent silver body. Additionally, there is a distinctive black band that runs horizontally from the eye to the caudal fin, enhancing the fish's overall appeal.


In their natural habitat, Rummynose Tetras inhabit slow-moving and clear waters in South America, particularly in the Rio Negro and Rio Orinoco river basins. To replicate their native environment, it is essential to set up a well-maintained aquarium with ample swimming space and a dark substrate to intensify the colors of the fish.

A schooling species by nature, Rummynose Tetras thrive best in groups of at least six individuals. Their strong social tendencies and shoaling behavior make them feel secure, reducing stress and promoting overall well-being. As far as tank size is concerned, a 20-gallon (75 liters) tank is the minimum recommended for a small group of Rummynose Tetras.


Maintaining stable water conditions is crucial for the health of these fish. The ideal temperature range for Rummynose Tetras is between 75°F to 82°F (24°C to 28°C), with a slightly acidic to neutral pH level of 6.0 to 7.0. It's important to use a reliable water testing kit to monitor parameters regularly and conduct partial water changes to keep the water quality in check.

Rummynose Tetras are omnivores, meaning they consume a varied diet of both animal and plant matter. In the wild, they feed on small invertebrates, algae, and organic debris. In captivity, they readily accept high-quality flake or pellet foods supplemented with occasional live or frozen treats like bloodworms, brine shrimp, and daphnia. Providing a balanced diet will ensure their well-being and vibrant colors.


With their peaceful temperament, Rummynose Tetras are a great addition to community aquariums. They coexist well with other small, non-aggressive fish, such as other tetra species, rasboras, and dwarf cichlids. However, it is best to avoid housing them with larger, aggressive species that may intimidate or prey upon these gentle fish.

Rummynose Tetras are very active swimmers, and their schooling behavior provides them with a sense of security. Watching a group of Rummynose Tetras darting around the tank in unison is a mesmerizing sight for any aquarium hobbyist.

While breeding Rummynose Tetras can be challenging, it is a rewarding experience for dedicated aquarists. To encourage breeding behavior, a separate breeding tank with dense planting, fine-leaved plants, or spawning mops can be set up. The water parameters should be similar to their main tank, with slightly softer water and a slightly higher temperature around 80°F (27°C).

When the conditions are suitable, the female Rummynose Tetra will scatter adhesive eggs among the plants or spawning medium. After spawning, it's essential to remove the adult fish to prevent them from eating the eggs. The eggs will hatch in about 24 to 36 hours, and the fry can be fed with infusoria or commercially available fry food.


In conclusion, the Rummynose Tetra is a captivating and peaceful addition to any community aquarium. Its vibrant red nose, striking coloration, and sociable nature make it a favorite among hobbyists. By providing the appropriate habitat, diet, and companions, aquarists can enjoy the delightful behavior and beauty of this charming fish species. Though breeding them might be a challenge, successful breeding endeavors are truly rewarding and add a whole new dimension to the joy of keeping Rummynose Tetras.