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Balay's stonebasher (Petrocephalus balayi) — Mormyridae

Balay's stonebasher

Petrocephalus balayi
Family: Mormyridae
LC · Least Concern

The Balay's stonebasher (Petrocephalus balayi) is a freshwater fish of the family Mormyridae that grows up to 11 cm.

Length
11 cm
Water
Freshwater
Diet
Carnivore
Behaviour
Small groups
Activity
Nocturnal
Body shape
Torpedo-shaped
Substrate
Sand / mud bottom
Danger
Harmless
Range
Central Africa, in rivers and streams of the Congo and Ogooué basins.
Edibility
Not eaten

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Description

Petrocephalus balayi is a small African elephantfish (family Mormyridae) of Central Africa. The species reaches about 11 cm and has a stocky, silvery-grey body with a blunt snout, large eyes and a small mouth. Like other mormyrids it has a weak electric organ with which it orients itself in turbid water, locates prey and communicates with conspecifics. It lives in rivers and streams and feeds mainly on insect larvae and small bottom invertebrates. The species is active mainly at night and is harmless to humans. Little is known in detail about its reproduction.

Frequently asked questions

How do you recognise the Balay's stonebasher?

The Balay's stonebasher has a torpedo-shaped body, is mainly silver-grey and shows a plain pattern. Small elephantfish with a blunt snout and large eyes; scans its surroundings with a weak electric organ.

Where does the Balay's stonebasher live?

The Balay's stonebasher lives in fresh water and is mostly found around sand or mud bottom. Central Africa, in rivers and streams of the Congo and Ogooué basins.

How big does the Balay's stonebasher get?

The Balay's stonebasher grows to a maximum of about 11 cm.

Is the Balay's stonebasher dangerous to humans?

No, the Balay's stonebasher is harmless to humans. None required: this species is harmless to humans.

Is the Balay's stonebasher edible?

The Balay's stonebasher is not usually eaten.

More photos

Balay's stonebasher (Petrocephalus balayi) — Mormyridae — 2
iNaturalist ((c) John P Friel, some rights reserved (CC BY))
Balay's stonebasher (Petrocephalus balayi) — Mormyridae — 3
iNaturalist ((c) H.Grenier, some rights reserved (CC BY-NC))
Balay's stonebasher (Petrocephalus balayi) — Mormyridae — 4
Wikimedia Commons — George Albert Boulenger (Public domain)
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All data

Identification

English name
Balay's stonebasher sourced
Scientific name
Petrocephalus balayi
Family
Mormyridae

Appearance

Size class
Small verified
Max length (cm)
11.0 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Silver / grey inferred
Pattern
Plain inferred
Tail shape
Forked inferred
Mouth position
Terminal inferred
Lips
Thin inferred
Barbels
No sourced
Dorsal fins
One continuous inferred
Dorsal spines
No sourced

Habitat & distribution

Water type
Freshwater sourced
Substrate
Sand / mud bottom sourced
Natural range
Central Africa, in rivers and streams of the Congo and Ogooué basins. inferred
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Diet (detail)
Insect larvae and small bottom-dwelling invertebrates sourced
Social behaviour
Small groups inferred
Territorial
No inferred
Activity
Nocturnal inferred
Reproduction
Separate sexes sourced
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
Small elephantfish with a blunt snout and large eyes; scans its surroundings with a weak electric organ. sourced

For anglers

Edibility
Not eaten sourced
Fishing method
Not a target species for angling; at most an incidental catch or usable as baitfish. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless sourced
First aid
None required: this species is harmless to humans. sourced

Status & sources

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

Same genus Petrocephalus

More from the family Mormyridae

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