三角丽鱼 · Uaru

Overview

Large size does not make Uaru amphiacanthoides an aggressive cichlid. It is relatively peaceful and best maintained as a pair or group, with warm, clean, well-filtered water. Wood and roots are more practical furnishings than a planted display because most aquatic plants are eaten.

Distribution & habitat

Records cover parts of the Amazon basin in northern Brazil and Guyana, including the middle and lower Negro and the Solimões–Amazon stretch between the Japurá and Tapajós. Clear tributaries with submerged branches and tree roots provide habitat.

Aquarium setup

A pair can start with an aquarium around 120 × 45 × 37.5 cm, approximately 200 L. Use sand or gravel with wood and root structures. Avoid depending on living plants for the layout, since most will be consumed. Effective filtration and consistently clean, warm water are essential.

Diet & feeding

Wild stomach contents include substantial plant matter together with invertebrates and even freshwater sponges, supporting an omnivorous diet. Captive feeding experiments indicate a stronger herbivorous tendency. Plant material should therefore receive substantial emphasis rather than relying entirely on animal foods.

Behaviour & compatibility

Avoid overly aggressive companions. Smaller characins can be housed with it, as can suitable South American cichlids and larger characins. Every tankmate must tolerate the elevated temperatures required by this species. Pairs or groups are preferable to solitary keeping.

Sexual dimorphism

There are no dependable, conspicuous external differences between the sexes.

Breeding

Eggs are deposited on a flat stone or wood. Wild fish need very soft, acidic breeding conditions resembling their habitat, while captive-bred stock is usually more accommodating. The young readily graze the parents' skin mucus, in a manner similar to discus.