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​The Rummynose Tetra: A Dazzling Jewel of the Aquarium

​The Rummynose Tetra: A Dazzling Jewel of the Aquarium

Posted by Max Gandara on on 11th Jul 2023

The Rummynose Tetra: A Dazzling Jewel of the Aquarium

The Rummynose Tetra (Hemigrammus rhodostomus) is a small freshwater fish that has become a popular choice among aquarium enthusiasts. Known for its vibrant colors and peaceful nature, this species adds beauty and serenity to any aquatic environment. In this article, we will explore the fascinating characteristics, care requirements, and breeding habits of the Rummynose Tetra.

The Rummynose Tetra is renowned for its distinctive red nose and the striking black wedge-shaped pattern on its silver body. These colorations create a captivating contrast that makes them stand out in any aquarium. Its body typically grows up to 2 inches (5 cm) in length, making it a suitable choice for both small and large aquarium setups.

Apart from its alluring appearance, the Rummynose Tetra is known for its peaceful demeanor. They are a shoaling fish and should be kept in groups of six or more to thrive. When kept in a school, their behavior becomes more active and lively, making them an excellent addition to community tanks. They generally exhibit peaceful interactions with other fish species, making them an ideal choice for community setups.

Native to the Amazon River Basin in South America, the Rummynose Tetra thrives in warm, acidic waters. To replicate their natural habitat, it is important to maintain specific water parameters in the aquarium. The water temperature should be kept between 75°F and 82°F (24°C and 28°C), with a pH level ranging from 5.5 to 7.5. Additionally, the tank should be well-filtered, and frequent water changes are necessary to keep the water quality pristine.

Aquascaping the tank with plants, driftwood, and rocks helps create a natural environment and provides hiding places for the Rummynose Tetras. Dense vegetation, such as Amazon sword plants or Java moss, works well in simulating their natural habitat and offers protection to the fish.


The Rummynose Tetra is an omnivorous fish with a preference for small invertebrates, insect larvae, and plant matter in the wild. In captivity, they readily accept a variety of foods, including high-quality flake or pellet food. Supplementing their diet with occasional live or frozen foods such as brine shrimp, bloodworms, or daphnia can enhance their coloration and overall health.

Maintaining a balanced diet and feeding them small amounts multiple times a day is essential. Overfeeding should be avoided, as it can lead to health issues and poor water quality. Regular monitoring of water parameters, along with proper maintenance and filtration, ensures the well-being of these delicate fish.

Breeding the Rummynose Tetra can be a rewarding experience for aquarists. To encourage spawning, a separate breeding tank with soft, acidic water and low lighting should be set up. The tank should be densely planted, providing hiding spots for the adult fish and protection for the eggs.

When conditions are favorable, the female will scatter her eggs among the plants, and the male will fertilize them. After spawning, the parents should be removed from the breeding tank to prevent them from eating the eggs. The eggs usually hatch within 24-36 hours, and the fry can be fed with infusoria or commercially available liquid fry food.