Home · Polypteridae · Mottled bichir
Mottled bichir (Polypterus weeksii) — Polypteridae

Mottled bichir

Polypterus weeksii
Family: Polypteridae
LC · Least Concern

The Mottled bichir (Polypterus weeksii) is a freshwater fish of the family Polypteridae that grows up to 54 cm.

Length
54 cm
Water
Freshwater
Diet
Carnivore
Behaviour
Solitary
Activity
Nocturnal
Body shape
Elongated (eel-like)
Substrate
Sand / mud bottom
Danger
Harmless
Edibility
Rarely eaten

Description

The mottled bichir is an ancient freshwater fish of the family Polypteridae from the Congo basin in Central Africa. The species has an elongate body covered with hard, glossy ganoid scales and a brown mottling, and bears a characteristic row of separate finlets on the back. It reaches about 54 cm and, thanks to a pair of lung-like swim bladders, can breathe air at the surface, an adaptation to oxygen-poor waters. It is a nocturnal, bottom-oriented hunter feeding on insects, crustaceans and small fishes. The species belongs to a very ancient group of ray-finned fishes.

Frequently asked questions

How do you recognise the Mottled bichir?

The Mottled bichir has an elongate, eel-like body, is mainly brown and shows a marbled pattern.

Where does the Mottled bichir live?

The Mottled bichir lives in fresh water and is mostly found around sand or mud bottom.

How big does the Mottled bichir get?

The Mottled bichir grows to a maximum of about 54 cm.

Is the Mottled bichir dangerous to humans?

No, the Mottled bichir is harmless to humans.

Is the Mottled bichir edible?

The Mottled bichir is rarely eaten.

Download Fin's Fish Guide

Identify fish in seconds, log your catches and dives. Join the TestFlight beta.

Get the beta →

All data

Identification

Dutch name
Gemarmerde bichir sourced
English name
Mottled bichir verified
Scientific name
Polypterus weeksii
Family
Polypteridae

Appearance

Size class
Large verified
Max length (cm)
54.0 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Brown inferred
Pattern
Marbled inferred
Tail shape
Rounded inferred
Mouth position
Terminal inferred
Lips
Thin inferred
Barbels
No sourced
Dorsal fins
One continuous inferred
Dorsal spines
Yes sourced

Habitat & distribution

Water type
Freshwater sourced
Substrate
Sand / mud bottom sourced
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Social behaviour
Solitary inferred
Territorial
No inferred
Activity
Nocturnal inferred
Reproduction
Separate sexes sourced
Sexual dimorphism
No inferred

For anglers

Edibility
Rarely eaten sourced
Fishing method
Bodemvissen met natuurlijk aas (worm, garnaal of vis) op of vlak boven de bodem. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless sourced

Status & sources

Sources
FishBase via GBIF (DwC-A), CC-BY-NC 4.0

Same genus Polypterus

More from the family Polypteridae

Download Fin's Fish Guide

Identify fish in seconds, log your catches and dives. Join the TestFlight beta.

Get the beta →