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Blotchy swellshark (Cephaloscyllium umbratile) — Scyliorhinidae

Blotchy swellshark

Cephaloscyllium umbratile

The Blotchy swellshark (Cephaloscyllium umbratile) is a saltwater fish of the family Scyliorhinidae that grows up to 120 cm.

Length
120 cm
Water
Saltwater
Depth
20.0–500.0 m
Activity
Nocturnal
Body shape
Elongated (eel-like)
Substrate
Stone or rock
Danger
Harmless
Edibility
Commonly eaten

Description

The blotchy swellshark is a catshark (Scyliorhinidae) from coastal and slope waters of the northwest Pacific, off East Asia. The species grows to about 1.2 metres and has a stocky, yellow-brown body with dark saddle blotches and spots. When threatened it can swallow water or air and swell into a hard-to-grip ball. As a nocturnal bottom-dweller it lives on rocky and sandy bottoms and eats fish, crustaceans and molluscs. It lays egg capsules. The fish is harmless to humans.

Frequently asked questions

How do you recognise the Blotchy swellshark?

The Blotchy swellshark has an elongate, eel-like body, is mainly brown and shows a spots pattern.

Where does the Blotchy swellshark live?

The Blotchy swellshark lives in the sea (marine waters) and is mostly found around stony or rocky ground.

How big does the Blotchy swellshark get?

The Blotchy swellshark grows to a maximum of about 120 cm.

Is the Blotchy swellshark dangerous to humans?

No, the Blotchy swellshark is harmless to humans.

Is the Blotchy swellshark edible?

Yes, the Blotchy swellshark is commonly eaten.

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All data

Identification

Dutch name
Japanse zwelhaai sourced
English name
Blotchy swellshark sourced
Scientific name
Cephaloscyllium umbratile
Family
Scyliorhinidae
Other names
Blotchy swell shark; Draughtsboard shark; Japanese swell shark; Japanese swellshark; Swell shark verified

Appearance

Size class
Extra large verified
Max length (cm)
120.0 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Brown sourced
Pattern
Spots sourced
Tail shape
Straight inferred

Habitat & distribution

Water type
Saltwater sourced
Substrate
Stone or rock sourced
Min depth (m)
20.0 verified
Max depth (m)
500.0 verified
Origin
Native inferred

Behaviour & biology

Territorial
No inferred
Activity
Nocturnal sourced
Reproduction
Separate sexes inferred
Sexual dimorphism
No inferred

For anglers

Edibility
Commonly eaten inferred
Fishing method
Vissen met natuurlijk aas (vis, garnaal, worm) of kunstaas dicht bij rif- en rotsstructuren. 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 Cephaloscyllium

More from the family Scyliorhinidae

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