Bichir Identification Guide
Recognize a Bichir by its row of separate spiny dorsal finlets, thick bony scales, and eel-like body.
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Key identification features
- Elongated, cylindrical, eel-like body
- A series of separate, spiny finlets running along the back in place of a single continuous dorsal fin
- Thick, hard, diamond-shaped ganoid scales giving an armored appearance
- Paired, fleshy-based (lobed) pectoral fins used to prop the body along the substrate
- Mottled, barred, or blotched brown, gray, or olive pattern depending on species
- Ability to gulp air at the surface using a lung-like swim bladder
Common look-alikes
- Reedfish (ropefish): a close relative that lacks paired pelvic fins entirely and has an even more slender, snake-like body than most Bichir species.
- Snakeheads: share an elongated shape and air-breathing habit, but snakeheads have one long, unbroken dorsal fin instead of the Bichir's row of separate spiny finlets.
- Eels: smooth-skinned and finless-looking along most of the body, lacking the Bichir's bony scales and distinctive finlet row.
Where you'll see one
Bichirs inhabit slow-moving rivers, floodplain lakes, swamps, and seasonally flooded wetlands across tropical Africa, from the Nile basin west through the Congo and Niger river systems. They are typically found near cover on muddy or vegetated bottoms and can survive brief periods out of water by breathing air.
Frequently asked questions
How do I tell a Bichir from a snakehead?
Look at the dorsal fin: a Bichir has a row of small, separate spiny finlets down its back, while a snakehead has one continuous, unbroken dorsal fin running the length of its body.
How do I tell a Bichir from a Reedfish?
Check for pelvic fins — Bichirs have small paired pelvic fins near the belly, while Reedfish (ropefish) lack pelvic fins entirely and have a thinner, more uniformly tube-like body.