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Biscuit skate (Raja straeleni) — Rajidae

Biscuit skate

Raja straeleni
Family: Rajidae
NT · Near Threatened

The Biscuit skate (Raja straeleni) is a saltwater fish of the family Rajidae that grows up to 70 cm.

Length
70 cm
Water
Saltwater
Depth
80.0–800.0 m
Diet
Carnivore
Behaviour
Solitary
Activity
Nocturnal
Body shape
Flat / disc-shaped
Substrate
Sand / mud bottom
Danger
Harmless
Edibility
Commonly eaten

Description

The biscuit skate is a diamond-shaped ray of the family Rajidae (true skates) reaching a disc width of about 70 cm. The upper side is brown with a fine marbling, numerous small spots and often an indistinct eyespot on each pectoral fin; the snout is somewhat pointed. Unlike stingrays it has no venomous tail spine but rows of small thorns over the back and tail. The species lives on sand and mud bottoms of the continental shelf from West Africa to South Africa. On the bottom it hunts crabs, shrimps, crustaceans and small fish. It is egg-laying: the embryos develop in horny egg cases. Through fishing pressure in the north of its range it is assessed as Near Threatened (NT).

Frequently asked questions

How do you recognise the Biscuit skate?

The Biscuit skate has a flattened, disc-shaped body, is mainly brown and shows a spots pattern.

Where does the Biscuit skate live?

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

How big does the Biscuit skate get?

The Biscuit skate grows to a maximum of about 70 cm.

Is the Biscuit skate dangerous to humans?

No, the Biscuit skate is harmless to humans.

Is the Biscuit skate edible?

Yes, the Biscuit skate is commonly eaten.

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All data

Identification

Dutch name
Biscuitrog verified
English name
Biscuit skate verified
Scientific name
Raja straeleni
Family
Rajidae
Other names
False thornback skate; Skate; Spotted skate verified

Appearance

Size class
Large verified
Max length (cm)
70.0 verified
Body shape
Flat / disc-shaped verified
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
No verified

Habitat & distribution

Water type
Saltwater verified
Substrate
Sand / mud bottom verified
Min depth (m)
80.0 verified
Max depth (m)
800.0 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
No verified

For anglers

Edibility
Commonly eaten verified
Fishing method
Bodemvissen met natuurlijk aas (worm, garnaal of vis) op of vlak boven de bodem. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless verified

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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