德氏兵鲶

Overview

Trade labels do not always reliably identify Brochis delphax. A relatively long snout, fading adult body spots, and a spotted tail are suggested clues, best considered together rather than as a single decisive mark.

Distribution & habitat

It has been recorded in the Inírida and elsewhere in Colombia’s upper Orinoco basin. The type locality is a tributary in the Inírida system of Guainía.

Aquarium setup

Use at least a 90 by 30 cm footprint with fine sand or carefully maintained rounded gravel. Include cover to help the group settle.

Diet & feeding

Provide sinking foods with varied small live or frozen supplements. Feed the fish directly rather than expecting it to obtain adequate nutrition by cleaning up after others.

Behaviour & compatibility

Keep at least four to six together; it is peaceful and social.

Sexual dimorphism

Females tend to be larger, rounder, and deeper-bodied when mature.

Breeding

A commonly used approach is two males per female, followed by a 50–70% cooler-water change and increased aeration when females are visibly gravid. Repeat as needed to encourage spawning. Eggs attach to glass, fine plants, or submerged mops, which simplify removal. Separate eggs or adults afterward and use well-oxygenated water from the spawning tank for incubation. Alder cones are one option used against fungal losses. Hatching generally takes three to four days; feed small live foods after yolk absorption. Fry need excellent water quality and appear to fare better over a thin sand layer than on bare glass.

Notes

The suggested diagnostic combination includes a dark patch reaching the upper front of the dorsal fin, but confusion with similar fishes remains possible. Occasional air gulps supplement respiration. Avoid direct handling pressure because the pectoral spines can puncture skin and their gland secretions may be mildly toxic.