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Polystigma (Nimbochromis polystigma) — Cichlidae

Polystigma

Nimbochromis polystigma
Family: Cichlidae
LC · Least Concern

The Polystigma (Nimbochromis polystigma) is a freshwater fish of the family Cichlidae that grows up to 23 cm.

Length
23 cm
Water
Freshwater
Depth
0.0–76.0 m
Diet
Carnivore
Behaviour
Solitary
Body shape
Torpedo-shaped
Substrate
Sand / mud bottom
Danger
Harmless
Range
Endemic to Lake Malawi in East Africa; mixed rock-sand habitats and vegetated areas.
Edibility
Rarely eaten

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Description

The polystigma is a predatory cichlid endemic to Lake Malawi in East Africa. The species grows to about 23 cm and has a pale-grey body with a pattern of large, dark, leopard-like blotches. It is most common in mixed rock-sand habitats and vegetated areas with Vallisneria and Potamogeton. The species is known for a remarkable hunting technique: it lies on its side and plays dead to lure unwary prey fishes, which it then ambushes. As a maternal mouthbrooder the female carries the eggs and young in her mouth. The species is popular in the aquarium and harmless to humans.

Frequently asked questions

How do you recognise the Polystigma?

The Polystigma has a torpedo-shaped body, is mainly silver-grey and shows a spots pattern. Plays dead to lure prey fishes; maternal mouthbrooder with leopard blotches.

Where does the Polystigma live?

The Polystigma lives in fresh water and is mostly found around sand or mud bottom. Endemic to Lake Malawi in East Africa; mixed rock-sand habitats and vegetated areas.

How big does the Polystigma get?

The Polystigma grows to a maximum of about 23 cm.

Is the Polystigma dangerous to humans?

No, the Polystigma is harmless to humans. None required: this species is harmless to humans.

Is the Polystigma edible?

The Polystigma is rarely eaten.

More photos

Polystigma (Nimbochromis polystigma) — Cichlidae — 2
iNaturalist ((c) Michael Verdirame, some rights reserved (CC BY-NC))
Polystigma (Nimbochromis polystigma) — Cichlidae — 3
Wikimedia Commons — Dr. Michael K. Oliver (CC BY-SA 3.0)
Polystigma (Nimbochromis polystigma) — Cichlidae — 4
Wikimedia Commons — Cymothoa exigua (CC BY-SA 3.0)
Polystigma (Nimbochromis polystigma) — Cichlidae — 5
iNaturalist ((c) saraalien1, some rights reserved (CC BY-NC))
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All data

Identification

English name
Polystigma verified
Scientific name
Nimbochromis polystigma
Family
Cichlidae

Appearance

Size class
Medium verified
Max length (cm)
23.0 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Silver / grey inferred
Pattern
Spots inferred
Tail shape
Straight inferred
Mouth position
Terminal inferred
Lips
Thick / fleshy inferred
Barbels
No sourced
Dorsal fins
One continuous inferred
Dorsal spines
Yes sourced

Habitat & distribution

Water type
Freshwater sourced
Substrate
Sand / mud bottom sourced
Min depth (m)
0.0 verified
Max depth (m)
76.0 verified
Natural range
Endemic to Lake Malawi in East Africa; mixed rock-sand habitats and vegetated areas. inferred
Origin
Native sourced

Behaviour & biology

Diet
Carnivore sourced
Diet (detail)
Small fishes sourced
Social behaviour
Solitary inferred
Territorial
Yes inferred
Reproduction
Separate sexes sourced
Sexual dimorphism
Yes inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
Plays dead to lure prey fishes; maternal mouthbrooder with leopard blotches. sourced

For anglers

Edibility
Rarely eaten sourced
Fishing method
Bottom fishing with natural bait (worm, shrimp or fish) on or just above the seabed. 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 Nimbochromis

More from the family Cichlidae

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