Congo Tetra Care Guide
Phenacogrammus interruptus · Freshwater Fish
What Congo Tetra look like
The Congo Tetra (Phenacogrammus interruptus) exhibits a laterally compressed and fusiform body shape, reaching a maximum adult size of approximately 5 inches (12.7 cm). This species displays sexual dimorphism, with males typically exhibiting more vibrant coloration, particularly in the fins, which are elongated and exhibit a striking iridescent sheen, while females are generally more robust and less colorful. Notable morphological features include a prominent adipose fin and a well-defined lateral line that aids in sensory perception. The dentition is small and conical, adapted for a varied diet. The overall coloration is a blend of blue and silver with a distinctive black horizontal stripe running from the eye to the base of the caudal fin, enhancing its visual appeal and aiding in camouflage within its natural habitat.
Behavior & temperament
Congo Tetras are social fish that thrive in groups, exhibiting a schooling behavior that enhances their safety from predators. They are primarily pelagic, inhabiting the upper to mid-water column of slow-moving rivers and streams in the Congo Basin. During breeding, they are egg scatterers, releasing fertilized eggs among aquatic vegetation. Their temperament is generally peaceful, although males may display mild aggression during breeding or when establishing dominance within the school. They are known to interact with their environment and exhibit curious behaviors, often exploring their surroundings.
Diet & feeding
In the wild, Congo Tetras are omnivorous, feeding on small invertebrates, plant matter, and detritus. In captivity, they require a varied diet that includes high-quality flake food, live or frozen foods such as brine shrimp and daphnia, as well as vegetable matter to ensure optimal health.
Behind the name
Phenacogrammus (deceptive line; interruptus (broken or interrupted))
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Congo Tetra?
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