What does bichir mean?
A bichir is a primitive freshwater fish belonging to the family Polypteridae, found in the rivers, floodplains, and swamps of tropical Africa. It is instantly recognizable by its long, eel-like body, armored scales, and a distinctive row of small spiny dorsal finlets running along its back. Perhaps its most remarkable feature is that it possesses lungs as well as gills, allowing it to gulp air at the surface and even survive brief periods out of water. Because their lineage diverged very early from other ray-finned fishes and has changed little over tens of millions of years, bichirs are often described as living fossils. The word appears chiefly in scientific, aquarium-keeping, and natural-history contexts rather than casual speech. Several species, notably the Senegal bichir, are popular in home aquaria, where their prehistoric appearance and nocturnal hunting habits make them prized, if demanding, specimens.
nounA primitive freshwater fish of the family Polypteridae, native to rivers and swamps of tropical Africa, having an elongated body, a series of dorsal finlets, and the ability to breathe atmospheric air.
- Any fish of the family Polypteridae: primitive ray-finned freshwater fishes of tropical Africa with elongated bodies, multiple dorsal finlets, and lungs used to supplement gill respiration.
"The aquarium's oldest resident is a bichir that surfaces every few minutes to gulp air."
"Keep a tight lid on the tank, because bichirs are notorious escape artists."
"The ornate bichir prowls the riverbed at night, using its sensitive nostrils to hunt for prey."
The regular plural "bichirs" is standard; some writers leave the noun unchanged after numbers, but the inflected form is more common in both scientific and hobbyist usage.
"The flooded grasslands teem with bichirs during the rainy season."
Bichirs can breathe actual air — these 'living fossils' have been around in essentially modern form since the age of the dinosaurs, and they'll happily stroll across a damp surface with their fins.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of bichir
The word entered English through French, which adopted it for these African fishes; its ultimate source may be a West African language, though this is not firmly established. It was applied to members of the genus Polypterus when European naturalists described the fauna of African rivers. Related names such as "reedfish" and "ropefish" are common alternatives for the single species Erpetoichthys calabaricus, often called the ropefish or reedfish.
Related word forms
How bichir is actually used
A specialized term used mainly by ichthyologists, aquarists, and in natural-history writing; it is rare in everyday conversation. The plural is usually "bichirs," though "bichir" is occasionally treated as unchanged.
Easily confused with bichir
"Beachier" is a comparative adjective meaning more like a beach, while "bichir" is a noun naming an African air-breathing fish.
"Birch" is a type of tree, whereas "bichir" is an elongated primitive freshwater fish.