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Blackchin guitarfish (Glaucostegus cemiculus) — Glaucostegidae

Blackchin guitarfish

Glaucostegus cemiculus
CR · Critically Endangered

The Blackchin guitarfish (Glaucostegus cemiculus) is a saltwater fish of the family Glaucostegidae that grows up to 242 cm.

Length
242 cm
Water
Saltwater
Depth
9.0–100.0 m
Diet
Carnivore
Behaviour
Solitary
Activity
Nocturnal
Body shape
Flat / disc-shaped
Substrate
Sand / mud bottom
Danger
Harmless
Range
Eastern Atlantic and the Mediterranean Sea, over sandy and silty bottoms of shallow coastal water and estuaries.
Edibility
Commonly eaten

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Description

The blackchin guitarfish is a large giant guitarfish of the family Glaucostegidae reaching about 2.4 metres long. It forms a transition between shark and ray: the front is flattened, with a long, pointed, translucent snout bearing a dark spot at the tip (the 'black chin'), while the rear body is sturdy and shark-like, with two dorsal fins and a powerful tail. Unlike stingrays it lacks a venomous spine. The species lives on sand and mud bottoms of shallow coastal water and estuaries in the eastern Atlantic and the Mediterranean. On the bottom it crushes crabs, shrimps, molluscs and small fish. Through heavy fishing - partly for the fin trade - it has declined sharply and is assessed as Critically Endangered (CR).

Frequently asked questions

How do you recognise the Blackchin guitarfish?

The Blackchin guitarfish has a flattened, disc-shaped body, is mainly brown and shows a plain pattern. Large giant guitarfish with a long, pointed, translucent snout and a dark blotch on the tip of the snout (the 'black chin').

Where does the Blackchin guitarfish live?

The Blackchin guitarfish lives in the sea (marine waters) and is mostly found around sand or mud bottom. Eastern Atlantic and the Mediterranean Sea, over sandy and silty bottoms of shallow coastal water and estuaries.

How big does the Blackchin guitarfish get?

The Blackchin guitarfish grows to a maximum of about 242 cm. On average the species is around 150 cm.

Is the Blackchin guitarfish dangerous to humans?

No, the Blackchin guitarfish is harmless to humans. Unlike stingrays a guitarfish has no venomous tail spine and is harmless; the rough skin can abrade, however.

Is the Blackchin guitarfish edible?

Yes, the Blackchin guitarfish is commonly eaten.

More photos

Blackchin guitarfish (Glaucostegus cemiculus) — Glaucostegidae — 2
© President and Fellows of Harvard College (CC BY-NC 4.0) via GBIF — MCZ
Blackchin guitarfish (Glaucostegus cemiculus) — Glaucostegidae — 3
iNaturalist ((c) coralga, some rights reserved (CC BY-NC))
Blackchin guitarfish (Glaucostegus cemiculus) — Glaucostegidae — 4
iNaturalist ((c) Iván Jesús Fernández Jiménez, some rights reserved (CC BY-NC))
Blackchin guitarfish (Glaucostegus cemiculus) — Glaucostegidae — 5
iNaturalist ((c) NGUECHE NGUEBOUI, some rights reserved (CC BY-NC))
Fin

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All data

Identification

English name
Blackchin guitarfish verified
Scientific name
Glaucostegus cemiculus
Family
Glaucostegidae
Other names
Blackchin guitarfish verified

Appearance

Size class
Extra large verified
Max length (cm)
242.0 verified
Average length (cm)
150.0 verified
Body shape
Flat / disc-shaped verified
Dominant colour
Brown sourced
Pattern
Plain sourced
Tail shape
Straight inferred
Mouth position
Inferior (downward) inferred
Lips
Thin inferred
Barbels
No verified
Dorsal fins
Two separate sourced
Dorsal spines
No verified

Habitat & distribution

Water type
Saltwater verified
Substrate
Sand / mud bottom verified
Min depth (m)
9.0 verified
Max depth (m)
100.0 verified
Natural range
Eastern Atlantic and the Mediterranean Sea, over sandy and silty bottoms of shallow coastal water and estuaries. verified
Origin
Native verified

Behaviour & biology

Diet
Carnivore verified
Diet (detail)
Crabs, shrimps, crustaceans, molluscs and small fishes from the bottom sourced
Social behaviour
Solitary verified
Territorial
No verified
Activity
Nocturnal inferred
Reproduction
Separate sexes verified
Sexual dimorphism
No verified
Seasonality
Bottom-dweller of shallow coastal water; ovoviviparous (live-bearing), with a few young per litter. sourced
Special features
Large giant guitarfish with a long, pointed, translucent snout and a dark blotch on the tip of the snout (the 'black chin'). sourced

For anglers

Edibility
Commonly eaten verified
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 verified
First aid
Unlike stingrays a guitarfish has no venomous tail spine and is harmless; the rough skin can abrade, however. sourced

Status & sources

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

Same genus Glaucostegus

Fin

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