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Brown moray (Gymnothorax unicolor) — Muraenidae

Brown moray

Gymnothorax unicolor
Family: Muraenidae
LC · Least Concern

The Brown moray (Gymnothorax unicolor) is a saltwater fish of the family Muraenidae that grows up to 100 cm.

Length
100 cm
Water
Saltwater
Depth
0.0–20.0 m
Diet
Carnivore
Behaviour
Solitary
Activity
Nocturnal
Body shape
Snake-like
Substrate
Stone or rock
Danger
May bite
Range
Mediterranean Sea and the adjacent eastern Atlantic, on rocky and hole-riddled bottoms of shallow to moderately deep water.
Edibility
Rarely eaten

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Description

The brown moray is a uniformly dark-brown moray of the family Muraenidae reaching about 1 metre. The snake-like, scaleless body lacks pectoral fins and has a continuous fin fringe over back, tail and belly; the mouth is set with sharp, backward-pointing teeth. By day the moray shelters with only its head out of a rock crevice, rhythmically opening and closing its mouth to pump water over the gills. The species lives on rocky bottoms of the Mediterranean and the adjacent eastern Atlantic. At night it ambushes fish, squid and crustaceans. It is not venomous, but can bite fiercely when disturbed; its teeth cause deep wounds that readily become infected.

Frequently asked questions

How do you recognise the Brown moray?

The Brown moray has a snake-like body, is mainly brown and shows a plain pattern. Uniformly brown moray without pectoral fins, with a continuous fin fringe and a mouth full of sharp teeth; shelters in rock crevices during the day.

Where does the Brown moray live?

The Brown moray lives in the sea (marine waters) and is mostly found around stony or rocky ground. Mediterranean Sea and the adjacent eastern Atlantic, on rocky and hole-riddled bottoms of shallow to moderately deep water.

How big does the Brown moray get?

The Brown moray grows to a maximum of about 100 cm.

Is the Brown moray dangerous to humans?

The Brown moray can bite, but is otherwise not dangerous to humans. Not venomous, but the bite of the sharp teeth can be deep and painful and quickly become infected: clean the wound thoroughly, disinfect and seek medical help for a serious bite.

Is the Brown moray edible?

The Brown moray is rarely eaten.

More photos

Brown moray (Gymnothorax unicolor) — Muraenidae — 2
iNaturalist ((c) Loïs Rancilhac, some rights reserved (CC BY-NC))
Brown moray (Gymnothorax unicolor) — Muraenidae — 3
iNaturalist ((c) whodden, some rights reserved (CC BY-NC))
Brown moray (Gymnothorax unicolor) — Muraenidae — 4
iNaturalist ((c) Charlotte Kirchner, some rights reserved (CC BY))

Easily confused with

These species look like the Brown moray and live in the same waters.

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All data

Identification

English name
Brown moray verified
Scientific name
Gymnothorax unicolor
Family
Muraenidae
Other names
Brown moray; Greek verified

Appearance

Size class
Extra large verified
Max length (cm)
100.0 verified
Body shape
Snake-like verified
Dominant colour
Brown sourced
Pattern
Plain sourced
Tail shape
Straight inferred
Mouth position
Terminal inferred
Lips
Thick / fleshy inferred
Barbels
No verified
Dorsal fins
One continuous sourced
Dorsal spines
No verified

Habitat & distribution

Water type
Saltwater verified
Substrate
Stone or rock verified
Min depth (m)
0.0 verified
Max depth (m)
20.0 verified
Natural range
Mediterranean Sea and the adjacent eastern Atlantic, on rocky and hole-riddled bottoms of shallow to moderately deep water. verified
Origin
Native verified

Behaviour & biology

Diet
Carnivore verified
Diet (detail)
Fishes, cephalopods and crustaceans, seized from ambush sourced
Social behaviour
Solitary verified
Territorial
Yes verified
Activity
Nocturnal inferred
Reproduction
Separate sexes verified
Sexual dimorphism
No verified
Seasonality
Shelters in rock crevices during the day and hunts at night; develops via a transparent leptocephalus larva. sourced
Special features
Uniformly brown moray without pectoral fins, with a continuous fin fringe and a mouth full of sharp teeth; shelters in rock crevices during the day. sourced

For anglers

Edibility
Rarely eaten verified
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
May bite verified
First aid
Not venomous, but the bite of the sharp teeth can be deep and painful and quickly become infected: clean the wound thoroughly, disinfect and seek medical help for a serious bite. sourced

Status & sources

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

Same genus Gymnothorax

More from the family Muraenidae

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