Ornate Bichir Care Guide - Aquarium Setup, Diet & Breeding

The Ornate Bichir is one of the most striking members of the ancient Polypterus family. Its elongated body is covered by tough, diamond-shaped bony scales, while a series of separate dorsal finlets gives its silhouette a distinctly prehistoric appearance. The dark greenish-brown body is marked with irregular cream, yellow and black patterning that resembles mottled camouflage.

This species is a nocturnal and crepuscular predator, spending much of the day resting near the bottom before becoming more active in the evening. It uses its strong sense of smell to locate prey and moves with a slow, deliberate undulation, although it can make surprisingly rapid lunges when hunting.

Ornate Bichirs possess paired lungs as well as gills, allowing them to breathe atmospheric air. This adaptation helps them survive in warm, poorly oxygenated waters and means they are closely associated with the ancient lineage of ray-finned fishes that predates most modern aquarium species.

In nature, they move through flooded forests, swamps and sluggish river margins where submerged roots, fallen branches and dense cover provide shelter. Their bold patterning breaks up the outline of the body among shadows, leaf litter and tangled vegetation.

Despite their unusual appearance, Ornate Bichirs can become familiar with their keeper and may learn to associate movement near the aquarium with feeding time. They remain powerful, opportunistic predators, however, and will swallow any suitably sized fish or invertebrate they can overpower.

Ornate Bichirs are native to central and western-central Africa, occurring in the Congo Basin and neighbouring river systems, including parts of the Democratic Republic of the Congo, the Republic of the Congo and Cameroon. They inhabit slow-moving rivers, floodplain areas, swamps and forested waters with muddy or sandy bottoms.

An adult Ornate Bichir should have at least 450 litres, with a footprint of approximately 180 x 60 cm or larger being preferable because floor space matters more than height. Use a secure, fully covered aquarium: this species is an accomplished escape artist and must have access to atmospheric air beneath the lid. Provide a soft sand substrate or smooth fine gravel, substantial driftwood, caves and robust plants for shelter, while leaving open areas for bottom-level swimming. Strong filtration and regular maintenance are important, but avoid excessively turbulent flow.

Up to about 60 cm (24 inches) in total length. Females are generally larger and heavier-bodied than males, while males usually remain somewhat smaller.

Ornate Bichirs are carnivorous predators and should be offered a varied diet based on meaty foods. Suitable options include earthworms, prawns, mussel, cockle, chopped fish, insect larvae and high-quality sinking carnivore pellets. Frozen foods are useful, while live foods can provide enrichment but should come from reliable sources to reduce the risk of introducing parasites. Feed appropriately sized portions and remove uneaten food promptly, as this species can produce considerable waste.

Suitable companions include robust fish too large to be swallowed, such as larger peaceful or mildly assertive cichlids, silver dollars, large barbs, datnioides and other similarly sized bichirs. They may also live with suitable large catfish, provided there is no excessive competition or aggression. Avoid small community fish, shrimp, ornamental snails and delicate species, all of which may be treated as prey. Highly aggressive cichlids and fin-nipping fish are poor choices, and Ornate Bichirs should not be housed with tankmates that will harass them or compete violently for food.

Breeding Ornate Bichirs is uncommon in home aquariums and usually requires a very large, mature breeding setup. Spawning is associated with seasonal changes, particularly heavier rainfall and slightly cooler, softer water. The male receives eggs from the female using his modified anal and caudal fins, then fertilises them before scattering them among fine-leaved plants or a spawning mop. Adults should be removed after spawning because they may eat the eggs. The eggs hatch in roughly four days, with larvae developing external gills and requiring very small live foods such as newly hatched brine shrimp.

Adult females are typically larger and broader through the body. Males are usually smaller and can be identified by their noticeably broader, thicker anal fin, which is used to receive and fertilise eggs during spawning.