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Coffin ray (Hypnos monopterygius) — Hypnidae

Coffin ray

Hypnos monopterygius
Family: Hypnidae

The Coffin ray (Hypnos monopterygius) is a saltwater fish of the family Hypnidae that grows up to 70 cm.

Length
70 cm
Water
Saltwater
Depth
0.0–240.0 m
Body shape
Irregular
Substrate
Stone or rock
Danger
Can cause injury
Range
Oceania: Australia

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Description

The coffin ray is an electric ray (Hypnidae) from coastal waters of Australia. The species grows to about 70 cm and has a stocky, pear-shaped, flattened, grey-brown body with small eyes and strongly rear-set fins. With large electric organs it can generate a powerful shock to stun prey and defend itself. As an ambush hunter it lies half-buried on sand and mud bottoms and engulfs surprisingly large fish. The shock is strong; never touch a live animal.

Frequently asked questions

How do you recognise the Coffin ray?

The Coffin ray has an irregular in shape 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 Coffin ray live?

The Coffin ray lives in the sea (marine waters) and is mostly found around stony or rocky ground. Oceania: Australia

How big does the Coffin ray get?

The Coffin ray grows to a maximum of about 70 cm. On average the species is around 40 cm.

Is the Coffin ray dangerous to humans?

The Coffin ray can cause injury; handle it with care. Do not touch a live electric ray with bare hands; the coffin ray can deliver a powerful electric shock. Anyone shocked should release the animal and steady themselves to avoid a fall. Seek medical help for heart complaints or persistent symptoms.

More photos

Coffin ray (Hypnos monopterygius) — Hypnidae — 2
Wikimedia Commons — CSIRO National Fish Collection (CC BY 3.0)
Coffin ray (Hypnos monopterygius) — Hypnidae — 3
Wikimedia Commons — Angler: A. Vogt, Photo: Fishbase (CC BY 3.0)
Coffin ray (Hypnos monopterygius) — Hypnidae — 4
iNaturalist ((c) Peter, some rights reserved (CC BY-NC))
Coffin ray (Hypnos monopterygius) — Hypnidae — 5
iNaturalist ((c) Harry Rosenthal, some rights reserved (CC BY-NC))
Fin

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All data

Identification

English name
Coffin ray sourced
Scientific name
Hypnos monopterygius
Family
Hypnidae
Other names
Australian numbfish; Coffin ray; Crampfish; Numbfish; Electric ray; Numbie; Short-tail electric ray; Torpedo verified

Appearance

Size class
Large verified
Max length (cm)
70.0 verified
Average length (cm)
40.0 verified
Body shape
Irregular sourced
Dominant colour
Brown sourced
Tail shape
Rounded inferred

Habitat & distribution

Water type
Saltwater sourced
Substrate
Stone or rock sourced
Min depth (m)
0.0 verified
Max depth (m)
240.0 verified
Natural range
Oceania: Australia 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
Fishing with natural bait (fish, shrimp, worm) or lures close to reef and rock structures. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Can cause injury verified
First aid
Do not touch a live electric ray with bare hands; the coffin ray can deliver a powerful electric shock. Anyone shocked should release the animal and steady themselves to avoid a fall. Seek medical help for heart complaints or persistent symptoms. sourced

Status & sources

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