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Dark mother-of-pearl eartheater (Gymnogeophagus gymnogenys) — Cichlidae

Dark mother-of-pearl eartheater

Gymnogeophagus gymnogenys
Family: Cichlidae

The Dark mother-of-pearl eartheater (Gymnogeophagus gymnogenys) is a freshwater fish of the family Cichlidae that grows up to 15 cm.

Length
15 cm
Water
Freshwater
Diet
Carnivore
Body shape
Torpedo-shaped
Substrate
Mixed bottom
Danger
Harmless
Range
South America: Brazil, Uruguay
Edibility
Commonly eaten

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Description

The dark mother-of-pearl eartheater is a cichlid from fresh water of the La Plata basin in southeastern South America. The species grows to about 15 cm and has a deep, greyish body with glittering pearly-blue spots on the head and flanks. As a bottom-dweller it sifts mouthfuls of sand, filtering out small invertebrates and plant material. It is a mouthbrooder. The fish is harmless to humans and is known from the aquarium trade.

Frequently asked questions

How do you recognise the Dark mother-of-pearl eartheater?

The Dark mother-of-pearl eartheater has a torpedo-shaped body, is mainly blue and shows a spots pattern.

Where does the Dark mother-of-pearl eartheater live?

The Dark mother-of-pearl eartheater lives in fresh water and is mostly found around mixed bottom. South America: Brazil, Uruguay

How big does the Dark mother-of-pearl eartheater get?

The Dark mother-of-pearl eartheater grows to a maximum of about 15 cm.

Is the Dark mother-of-pearl eartheater dangerous to humans?

No, the Dark mother-of-pearl eartheater is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.

Is the Dark mother-of-pearl eartheater edible?

Yes, the Dark mother-of-pearl eartheater is commonly eaten.

More photos

Dark mother-of-pearl eartheater (Gymnogeophagus gymnogenys) — Cichlidae — 2
Wikimedia Commons — W.S.Serra (CC BY-SA 4.0)
Dark mother-of-pearl eartheater (Gymnogeophagus gymnogenys) — Cichlidae — 3
iNaturalist ((c) Matías Zarucki, some rights reserved (CC BY-NC))
Dark mother-of-pearl eartheater (Gymnogeophagus gymnogenys) — Cichlidae — 4
Wikimedia Commons — Cláudio Dias Timm (CC BY-SA 2.0)
Dark mother-of-pearl eartheater (Gymnogeophagus gymnogenys) — Cichlidae — 5
iNaturalist ((c) RAFAEL, some rights reserved (CC BY-NC))

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All data

Identification

English name
Dark mother-of-pearl eartheater sourced
Scientific name
Gymnogeophagus gymnogenys
Family
Cichlidae
Other names
Earth eater; Smooth-cheek eartheater; Dark mother-of-pearl fish verified

Appearance

Size class
Small verified
Max length (cm)
15 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Blue sourced
Pattern
Spots sourced
Tail shape
Rounded

Habitat & distribution

Water type
Freshwater sourced
Substrate
Mixed bottom sourced
Natural range
South America: Brazil, Uruguay sourced
Origin
Native

Behaviour & biology

Diet
Carnivore
Diet (detail)
Small fishes, crustaceans and invertebrates
Territorial
Yes
Reproduction
Separate sexes
Sexual dimorphism
Yes
Seasonality
Present year-round in its habitat; no pronounced seasonality known.

For anglers

Edibility
Commonly eaten
Fishing method
Small in size and barely an angling target; mostly caught incidentally or as baitfish.
Regulations source

Safety

Danger to humans
Harmless verified
First aid
This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status. verified

Status & sources

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

Same genus Gymnogeophagus

More from the family Cichlidae

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