Alestes Tetra

Adults of this fish species reach approximately 6 cm in length. Their body is characterized by a high shape, a large head, and big eyes, which help them navigate and find food effectively in murky water and low light conditions. Their coloration is silvery with noticeable greenish iridescence. The fins are translucent, with reddish tints in places and a characteristic white edge. A large black spot on the caudal peduncle is noteworthy. A similar spot at the base of the tail is also present in the closely related species, Brycinus nurse, which sometimes causes confusion due to the similar body shape.

The species inhabits the Congo River basin in the Central African Republic, the Republic of Congo, and the Democratic Republic of Congo. The fish live in tropical freshwater bodies with slow currents. In their natural environment, they prefer areas with soft water, rich in organic debris, and abundant coastal vegetation.

These fish prefer to be in a group with their conspecifics or closely related species, so it is advisable to acquire them in a school of 5–6 individuals. They are peaceful and get along well with many other aquarium fish of comparable size.

For a school of 5–6 individuals, the optimal aquarium volume starts from 120 liters. For decor, it is recommended to use dark substrate, as well as thickets of shade-loving plants, such as Anubias. Snags and other elements that create shelters are welcome. Lighting should be subdued, and additional shading can be provided by floating plants. To recreate the natural chemical composition of the water, leaves and bark of certain trees are placed at the bottom of the aquarium, which release tannins when decomposing, staining the water brown. More detailed information on this can be found in the article "Which tree leaves can be used in an aquarium." It is very important to maintain a stable hydrochemical composition of the water, not exceeding the recommended pH and dH values. In addition, high water quality is critically important, which implies low levels of pollutants and nitrogen cycle products. This requires uninterrupted operation of the filtration system and weekly aquarium maintenance, including partial water changes and removal of organic waste – food remnants and excrement.

Alestes Tetras raised in captivity are usually already accustomed by breeders to popular dry foods, which eliminates problems with their nutrition. Their daily diet can consist of dry flakes, granules, supplemented with live or frozen food. These fish exhibit a peaceful character and successfully coexist with many fish species of similar size. It is preferable to keep them in the company of conspecifics or closely related species, so it is recommended to acquire a group of 5–6 individuals.

Breeding in aquarium conditions is not well studied. Spawning is paired or communal, egg-laying. Soft and slightly acidic water is required to stimulate the process. Eggs are laid among fine-leaved plants. The fish do not show parental care for their offspring and are prone to eating eggs, so the parents should be removed immediately after spawning.

No specific diseases characteristic only of this species have been identified. If water parameters are not met and living conditions are poor, the fish are susceptible to common infectious and parasitic diseases, such as ichthyophthiriasis or bacterial skin lesions. Prevention involves maintaining stable water quality, regular water changes, and providing a complete diet.

When purchasing, choose active individuals with clean fins and no visible body damage. Healthy fish have the species-specific sheen of scales and a distinct dark spot in the caudal region. It is recommended to avoid purchasing fish with signs of lethargy, damaged gill covers, or an unnaturally bloated abdomen, which may indicate hidden diseases.