Overview
The Saddled Bichir (Polypterus endlicheri) is a living freshwater fossil belonging to the ancient actinopterygian order Polypteriformes, a basal fish lineage that diverged nearly 400 million years ago. Armored in heavy, interlocking ganoid scales and crowned with a distinct row of dorsal finlets resembling dragon spines, this primordial predator thrives in the murky, oxygen-depleted river basins and swamps of equatorial Africa.
Biology and Physical Characteristics
Polypterus endlicheri combines an elongated, snake-like body with extraordinary respiratory physiology. Because tropical African wetlands routinely experience severe hypoxia, the saddled bichir possesses functional paired lungs connected to its pharynx, breathing atmospheric air through dorsal spiracles located atop its head. Its body is encased in hard, diamond-shaped ganoid scales with an outer enamel layer of ganoine, providing near-impenetrable armor. The species is characterized by a protruding lower jaw and bold, irregular vertical black saddle bands crossing its grayish-ochre flanks.
Behavior and Ecology
The saddled bichir is a patient, benthic ambush hunter that stalks muddy river substrates under the cover of darkness. Using muscular, lobe-like pectoral fins, the fish ‘walks’ deliberately along river bottoms before lunging forward with an explosive suction strike to engulf passing fish and crustaceans. During the seasonal flood pulse, breeding pairs scatter adhesive eggs among flooded terrestrial vegetation; newly hatched larvae exhibit external feathery gills resembling salamander larvae before metamorphosing into lung-breathing juveniles.
Conservation and Human Impact
While evaluated as Least Concern due to its vast distribution across major African watersheds, local populations are vulnerable to industrial wetland reclamation, severe river damming that disrupts seasonal spawning migrations, and siltation from upstream deforestation. The saddled bichir is also popular in the international ornamental fish trade, where sustainable captive aquaculture has reduced pressures on wild river stocks.
Interesting Factoid
The saddled bichir has survived virtually unchanged for hundreds of millions of years; its lungs are so efficient that if kept moist, it can survive completely out of water for multiple days.
Last updated: October 2026