Long-nosed Distichodus Care Guide - Aquarium Size, Diet & Breeding

The Long-nosed Distichodus is a striking, deep-bodied African characin with an elongated, pointed snout and a strong, streamlined profile. Its silvery to olive-gold body is marked with dark horizontal bands or bars, while the fins may show warm red or orange colouring, especially in healthy mature specimens. The unusual head shape gives this species a distinctive appearance among large aquarium fish.

In the wild, these fish are active swimmers that spend much of their time exploring open water and grazing among submerged vegetation. Young specimens may behave in loose groups, but adults can become more assertive and territorial, particularly in confined aquariums. They are powerful fish with a reputation for nipping the fins of slower or long-finned tankmates.

Long-nosed Distichodus are primarily plant-eaters, using their specialised mouth and strong jaws to browse on aquatic plants, algae and other soft vegetation. They also consume small invertebrates and other available food, making them flexible omnivores rather than strict herbivores.

This species is collected for the ornamental fish trade while also being valued as a food fish in parts of its native range. It is best suited to experienced keepers with facilities for very large fish, as its eventual size, activity level and potential aggression make it unsuitable for most community aquariums.

Long-nosed Distichodus are native to central Africa, particularly the Congo River Basin and connected waterways in the Democratic Republic of the Congo and the Republic of the Congo. They inhabit tropical freshwater rivers, tributaries and floodplain environments.

A single adult Long-nosed Distichodus requires at least 500 litres, although a larger aquarium is strongly preferable; a tank around 180 cm long and 60 cm wide should be treated as a starting point rather than a luxury. These active, powerful swimmers need substantial open water, strong filtration and a secure cover. Use a soft sand or fine-gravel substrate, with smooth rocks, robust bogwood and sturdy plants arranged around the sides and rear to create shelter while preserving a broad swimming area. Expect delicate plants to be eaten or uprooted, so hardy vegetation or artificial planting may be more practical.

Long-nosed Distichodus can reach about 40 cm (15.7 inches) in total length in the wild, although aquarium specimens are more often around 25–30 cm (9.8–11.8 inches). Females are generally fuller-bodied and may grow slightly larger than males.

Offer a predominantly vegetable-based diet built around algae wafers, spirulina foods, blanched courgette, spinach, peas, shelled cucumber and other suitable greens. Supplement this with quality sinking pellets and occasional foods such as brine shrimp, bloodworm or prawns to provide variety and protein, particularly for young fish. Feed small portions regularly and remove uneaten vegetables before they decay. A varied diet rich in plant matter helps limit the tendency to graze on aquarium plants.

Long-nosed Distichodus can sometimes be housed with other robust, similarly sized African fish, including large Congo tetras, larger barbs, bichirs, robust Synodontis catfish and suitable medium-to-large African cichlids. Tankmates should be active, durable and too large to be swallowed. Avoid delicate species, small tetras, ornamental shrimp, slow-moving fish and anything with flowing fins, as this Distichodus may chase or nip them. Adult specimens may also fight with one another unless kept in a very spacious aquarium with visual barriers and ample room to retreat.

Long-nosed Distichodus are not regularly bred in home aquariums, and reliable captive-breeding methods are poorly documented. They are believed to be open-water egg scatterers that reproduce seasonally in response to rising water levels and abundant food. A successful attempt would require a very large dedicated aquarium or breeding system, a group of mature fish, excellent conditioning with substantial plant matter, and carefully managed water changes to imitate the onset of the rainy season. The adults would need to be removed after spawning because the scattered eggs and fry would otherwise be vulnerable to predation.

Sexual differences are subtle. Mature females are usually broader through the belly, especially when carrying eggs, while males tend to be slimmer and more streamlined; there are no consistently reliable colour or fin markings for sexing young fish.