Home · Narkidae · Sleeper torpedo ray
Sleeper torpedo ray (Crassinarke dormitor) — Narkidae

Sleeper torpedo ray

Crassinarke dormitor
Family: Narkidae

The Sleeper torpedo ray (Crassinarke dormitor) is a saltwater fish of the family Narkidae that grows up to 30 cm.

Length
30 cm
Water
Saltwater
Depth
80.0–? m
Body shape
Flat / disc-shaped
Substrate
Sand / mud bottom
Danger
Can cause injury
Range
Asia: China, Taiwan/Ch Taipei, Japan

Want the complete picture on the Sleeper torpedo ray?

Get the app

Description

The sleeper torpedo ray is a small electric ray (Narkidae) from shallow sand and mud water of the northwest Pacific. The species grows to about 30 cm and has a round, flat, soft disc with a short tail. In its 'wings' it carries electric organs with which it delivers a jolt to stun prey and defend itself. Half-buried it waits for small crustaceans, worms and small fish. A touch can give a person an unpleasant electric shock.

Frequently asked questions

How do you recognise the Sleeper torpedo ray?

The Sleeper torpedo ray has a flattened, disc-shaped body and is mainly brown. Bears sharp spines, plates or strong jaws that can cause cuts or puncture wounds; handle with care.

Where does the Sleeper torpedo ray live?

The Sleeper torpedo ray lives in the sea (marine waters) and is mostly found around sand or mud bottom. Asia: China, Taiwan/Ch Taipei, Japan

How big does the Sleeper torpedo ray get?

The Sleeper torpedo ray grows to a maximum of about 30 cm.

Is the Sleeper torpedo ray dangerous to humans?

The Sleeper torpedo ray can cause injury; handle it with care. This fish can deliver an electric shock that causes muscle cramp and a startle reaction; do not touch it. Someone receiving an unexpected shock in the water may briefly lose control, which is dangerous while swimming. For persistent symptoms or a fall caused by the shock, see a doctor.

Fin

Want the complete picture on the Sleeper torpedo ray?

Point your camera at the fish and Fin names the species in seconds. Free, and the Sleeper torpedo ray is one of 12,519 species in the app.

Get the app →

All data

Identification

English name
Sleeper torpedo ray sourced
Scientific name
Crassinarke dormitor
Family
Narkidae
Other names
Sleeper torpedo sourced

Appearance

Size class
Small verified
Max length (cm)
30 inferred
Body shape
Flat / disc-shaped sourced
Dominant colour
Brown sourced
Tail shape
Straight inferred

Habitat & distribution

Water type
Saltwater sourced
Substrate
Sand / mud bottom sourced
Min depth (m)
80.0 verified
Natural range
Asia: China, Taiwan/Ch Taipei, Japan sourced
Origin
Native inferred

Behaviour & biology

Territorial
No inferred
Reproduction
Separate sexes inferred
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
Bears sharp spines, plates or strong jaws that can cause cuts or puncture wounds; handle with care. inferred

For anglers

Fishing method
Small in size and barely an angling target; mostly caught incidentally or as baitfish. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Can cause injury verified
First aid
This fish can deliver an electric shock that causes muscle cramp and a startle reaction; do not touch it. Someone receiving an unexpected shock in the water may briefly lose control, which is dangerous while swimming. For persistent symptoms or a fall caused by the shock, see a doctor. sourced

Status & sources

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

More from the family Narkidae

Fin

Want the complete picture on the Sleeper torpedo ray?

Point your camera at the fish and Fin names the species in seconds. Free, and the Sleeper torpedo ray is one of 12,519 species in the app.

Get the app →
Is this the Sleeper torpedo ray? Get the app