Ornate Bichir

The Ornate Bichir (Polypterus ornatipinnis) is one of the most vividly patterned members of Polypteridae, an ancient family of African freshwater fishes with lungs as well as gills. It inhabits swamps, floodplains, and slow tributaries of the Congo River basin in Central Africa. Bichirs are often described as living fossils, retaining primitive features such as paired lungs, thick ganoid scales, and a series of separate finlets along the back rather than a single continuous dorsal fin. The species is not considered threatened and remains a recognizable, widespread inhabitant of Congo Basin wetlands.

Ornate Bichir are identified by their distinctive patterning and body form:

• Elongated, cylindrical, eel-like body
• Complex reticulated leopard-like pattern of dark lines forming a net over a yellow to tan background
• A row of 8 to 18 small, separate spiny finlets running along the back instead of one dorsal fin
• Broad, flattened head with a protruding lower jaw
• Large, paddle-shaped paired pectoral fins used for maneuvering

The bold reticulated pattern separates it from plainer bichir species such as the barred Delhezi Bichir, which shows vertical bands rather than a net-like design.

This species lives in slow-moving, often turbid freshwater habitats including swamps, flooded forest margins, and quiet tributaries of the Congo River basin in Central Africa. It favors warm, still to slow-flowing water with abundant cover from submerged wood, roots, or vegetation, where it can rest during the day. Because it can breathe air using a pair of lungs connected to its throat, the Ornate Bichir tolerates poorly oxygenated, stagnant water that would be unsuitable for most fish, including seasonally flooded habitats that dry or stagnate part of the year.

Ornate Bichir are primarily nocturnal, solitary hunters that remain still near cover during the day and become active after dark, using well-developed smell and touch senses to locate prey such as small fish, insects, and crustaceans in murky water. They regularly surface to gulp air through their lungs, an adaptation critical for survival in oxygen-depleted swamp habitats. Movement is often serpentine, using body undulation alongside their paired fins for slow, controlled maneuvering near structure. Little is documented about wild spawning, but like other bichirs they are believed to scatter adhesive eggs among vegetation with no parental care afterward.