Congo Tetra

Congo tetra are a popular aquarium species.

Congo tetras are egg-scattering fish that exhibit no parental care. They are known to spawn in groups or in pairs, with breeding typically occurring in soft, slightly acidic to neutral water conditions (pH 6.0–7.5) with a temperature range of . A dimly lit environment and the presence of fine-leaved plants or a spawning mop are beneficial, as the species tends to scatter eggs among vegetation. During courtship, males display intensified coloration and extended fin rays while performing a display to attract females. Once spawning occurs, the female releases several hundred adhesive eggs, which settle among the plants or substrate. The eggs typically hatch within 6 to 7 days, depending on water temperature, and the fry become free-swimming shortly thereafter. Due to their tendency to consume their own eggs, it is common practice in controlled breeding conditions to separate the adult fish after spawning. The fry require microscopic food such as infusoria or liquid fry food initially, before transitioning to baby brine shrimp and finely crushed flake food as they grow. Growth is relatively fast under optimal conditions, with juveniles developing their characteristic iridescent colors and elongated fins as they mature. Congo tetras reach sexual maturity at approximately 9 to 12 months of age. Successful breeding in home aquariums can be challenging, often requiring careful monitoring of water parameters and the use of a separate breeding tank to optimize survival rates.

The IUCN lists the Congo tetra as a species of Least Concern.