Gymnocorymbus ternetzi (Black Widow)

Known under black widow tetra he lives by band of 6 to 7 individuals maximum. It easily adapts to a minimum 60L tank.

The gymnocorymbus ternetzi is a freshwater fish belonging to the Characidae family. It is also known as Tetra noir or tetra flag. The gymnocorymbus ternetzi is from the hydrographic basins of Paraguay and Argentina, where it is commonly found in rivers, lakes and ponds.

The gymnocorymbus ternetzi has an elongated and slender body shape, with a large flat head and a mouth armed with small teeth. Its color generally varies between gray, blue and black, with patterns in vertical strips along its body. The gymnocorymbus ternetzi can reach an adult size of about 4.5 cm for males, and 5.5 cm for females.

The gymnocorymbus ternetzi is a gregarious fish, which means that it tends to live in a group with other individuals of its species. This allows him to protect himself from predators and feel safe in his environment. The gymnocorymbus ternetzi is also a very active fish, which likes to swim and move quickly in the water.

The gymnocorymbus ternetzi is an omnivorous fish, that is to say that it feeds on both plants and animals. In nature, its diet can include algae, insects, crustaceans and molluscs. In captivity, the gymnocorymbus ternetzi can be nourished with pellets or flakes for aquarium fish, as well as living or frozen food such as artemias or daphnia.

The gymnocorymbus ternetzi is an easy aquarium reproduction fish. Males and females easily recognize their size and color, males are generally smaller and more colored than females. For reproduction, it is recommended to maintain a group of at least 6 individuals in a well planted aquarium, with a water temperature around 25 degrees Celsius. The females lay their eggs on the sheets of the plants, and the males take care of fertilization. Alevines are born after a few days, and can be fed with artemias or infuses.