Flagtail Catfish Care Guide
Dianema urostriatum · Freshwater Fish
What Flagtail Catfish look like
Dianema urostriatum, commonly known as the Flagtail Catfish, exhibits a medium-sized, fusiform body that can reach a maximum adult size of approximately 4-5 inches. The body is covered in a series of bony plates, providing a robust armor that is characteristic of the Callichthyidae family. The most striking morphological feature is its caudal fin, which displays bold black-and-white stripes reminiscent of a flag, contrasting sharply with the otherwise brownish body coloration. This species possesses long, sensitive barbels that aid in foraging, and it features a well-developed lateral line system, allowing it to detect vibrations in the water. Sexual dimorphism is subtle, with males typically being slightly smaller and exhibiting more vibrant coloration during breeding periods. Defensive adaptations include its armored plating and the ability to produce mucous that can deter potential predators.
Behavior & temperament
The Flagtail Catfish is primarily a benthic species, often found dwelling near the substrate of slow-moving rivers and streams in its native South America. It exhibits a social hierarchy, typically preferring to inhabit small groups, although it can also be observed as a solitary individual. This species is known for its peaceful temperament, making it an excellent community fish, though it may display territorial behavior during breeding. Breeding involves the construction of bubble nests, where the female scatters eggs, and the male guards the nest until hatching. The Flagtail Catfish is generally non-aggressive, but it may become more assertive when competing for food or during the breeding season.
Diet & feeding
In the wild, the Flagtail Catfish is an omnivore, feeding on a varied diet that includes detritus, plant matter, and small invertebrates. In captivity, it thrives on a balanced diet of high-quality sinking pellets, supplemented with occasional live or frozen foods such as bloodworms and brine shrimp to ensure optimal health and coloration.
Behind the name
Dianema (from Greek, meaning 'to bind' or 'to tie'); urostriatum (from Latin, 'uro-' meaning 'tail' and 'striatum' meaning 'striped').
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Flagtail Catfish?
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