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Thornback ray (Raja clavata) — Rajidae

Thornback ray

Raja clavata
Family: Rajidae
NT · Near Threatened

The Thornback ray (Raja clavata) is a saltwater fish of the family Rajidae that grows up to 105 cm.

Length
105 cm
Water
Saltwater
Depth
5.0–1020.0 m
Diet
Carnivore
Behaviour
Solitary
Activity
Nocturnal
Body shape
Irregular
Substrate
Sand / mud bottom
Danger
Harmless
Edibility
Commonly eaten

Description

The thornback ray is a flat cartilaginous fish of the family Rajidae reaching a wingspan of about 1 metre. The diamond-shaped body, formed by the pectoral fins fused to the head, is brownish with light and dark spots giving good camouflage on the bottom. Characteristic are the rows of curved thorns on the back and tail and the large 'bucklers' on thickened skin plates, from which the species takes its name. It lives on sand and mud bottoms of the eastern Atlantic, the North Sea and the Mediterranean, from shallow water to hundreds of metres. On the bottom it hunts crabs, shrimps, shellfish and small fish. It lays eggs in horny capsules. Due to fishing it is assessed as Near Threatened (NT).

Frequently asked questions

How do you recognise the Thornback ray?

The Thornback ray has an irregular in shape body, is mainly brown and shows a spots pattern.

Where does the Thornback ray live?

The Thornback ray lives in the sea (marine waters) and is mostly found around sand or mud bottom.

How big does the Thornback ray get?

The Thornback ray grows to a maximum of about 105 cm. On average the species is around 85 cm.

Is the Thornback ray dangerous to humans?

No, the Thornback ray is harmless to humans.

Is the Thornback ray edible?

Yes, the Thornback ray is commonly eaten.

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All data

Identification

Dutch name
Stekelrog sourced
English name
Thornback ray verified
Scientific name
Raja clavata
Family
Rajidae
Other names
Rocker; Roker; Skate; Thornback verified

Appearance

Size class
Extra large verified
Max length (cm)
105.0 verified
Average length (cm)
85.0 verified
Body shape
Irregular sourced
Dominant colour
Brown sourced
Pattern
Spots sourced
Tail shape
Straight inferred
Mouth position
Inferior (downward) inferred
Lips
Thin inferred
Barbels
No verified
Dorsal fins
Two separate sourced
Dorsal spines
Yes verified

Habitat & distribution

Water type
Saltwater sourced
Substrate
Sand / mud bottom sourced
Min depth (m)
5.0 verified
Max depth (m)
1020.0 verified
Origin
Native verified

Behaviour & biology

Diet
Carnivore verified
Social behaviour
Solitary verified
Territorial
No verified
Activity
Nocturnal inferred
Reproduction
Separate sexes verified
Sexual dimorphism
Yes verified
levensduur_max_jaar
15.0 verified

For anglers

Edibility
Commonly eaten verified
Fishing method
Bodemvissen vanaf branding of boot met zeepier, makreel- of inktvisstukken als aas sourced
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 Raja

More from the family Rajidae

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