带尾双线美鲶 · Flagtail Catfish

Overview

Dianema urostriatum is a peaceful choice for a roomy community aquarium. Small groups are more outgoing than single fish and sometimes move together through midwater. Recent wild imports may be delicate even though acclimated individuals usually become hardy and adaptable.

Distribution & habitat

It occurs in parts of the Brazilian Amazon, principally in slower creeks, tributaries, floodplain lakes, and ponds away from major river channels.

Aquarium setup

Provide abundant shelter using wood, roots, and optionally dried leaves over sand. Dense planting is another suitable approach. The exact style matters less than secure cover. Water toward the more acidic end of its tolerated range is preferred.

Diet & feeding

Sinking pellets can be supplemented with bloodworms, brine shrimp, chopped earthworms, and other suitably small live or frozen foods. It is generally undemanding about food and often takes meals at the surface once settled.

Behaviour & compatibility

Peaceful tetras, cichlids, corys, and smaller loricariids are possible partners. Very small companions are usually left alone, although tiny fry may be eaten. Avoid communities dominated by much larger or aggressive fish. Three to six together encourage activity, with little aggression among their own kind.

Sexual dimorphism

The foremost pectoral rays are slightly thicker in males. Mature females may be rounder, a distinction best treated cautiously.

Breeding

Captive spawning has occurred repeatedly, but accounts disagree about whether eggs are placed in a bubble nest or a depression in the substrate. A group of four to six, anchored floating material as a potential nest support, abundant live food, and cooler replacement water form one suggested trial. Separate adults once eggs are found. After yolk absorption, fry should accept brine shrimp nauplii or microworms.

Simulating the transition between dry and wet periods is another experimental approach: lower water temporarily, then replenish with cooler, softer water while increasing food. Seasonal timing and atmospheric pressure may also influence breeding. None of these suggestions resolves the conflicting accounts of the spawning site.

Notes

Judge new arrivals by their present feeding and condition. The durability of settled specimens does not mean newly imported fish will be equally resilient.