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Giant moray (Gymnothorax javanicus) — Muraenidae

Giant moray

Gymnothorax javanicus
Family: Muraenidae

The Giant moray (Gymnothorax javanicus) is a saltwater fish of the family Muraenidae that grows up to 300 cm.

Length
300 cm
Water
Saltwater
Depth
0.0–50.0 m
Behaviour
Solitary
Activity
Nocturnal
Body shape
Snake-like
Substrate
Stone or rock
Danger
Venomous / poisonous
Range
Asia: American Samoa, Australia, Brunei Darsm, Sri Lanka, Taiwan/Ch Taipei, Christmas I. and others
Edibility
Not eaten

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Description

The giant moray is the largest moray (Muraenidae) of the Indo-Pacific. The species grows to about 3 metres and has a heavy, elongate, snake-shaped, scaleless body that in adults is dark and mottled with black spots. As a nocturnal top reef predator it hides by day in caves and crevices and seizes fish and octopus at night. Large specimens are among the most important ciguatera carriers and must not be eaten; it also bites fiercely when disturbed. Caution is advised.

Frequently asked questions

How do you recognise the Giant moray?

The Giant moray has a snake-like body, is mainly brown and shows a spots pattern. Note: in tropical areas this species can cause ciguatera poisoning when eaten; large specimens of coral reef predators can accumulate the toxin. Eat with care or avoid in risk areas.

Where does the Giant moray live?

The Giant moray lives in the sea (marine waters) and is mostly found around stony or rocky ground. Asia: American Samoa, Australia, Brunei Darsm, Sri Lanka, Taiwan/Ch Taipei, Christmas I. and others

How big does the Giant moray get?

The Giant moray grows to a maximum of about 300 cm.

Is the Giant moray dangerous to humans?

The Giant moray is venomous — handle spines with care and seek medical help after a sting if needed. Large specimens can carry ciguatera, a food-chain toxin not destroyed by cooking; do not eat. For poisoning (tingling, reversed hot-cold sensation, gastrointestinal symptoms): seek medical help. This large moray can also bite fiercely; do not reach into crevices with bare hands.

Is the Giant moray edible?

The Giant moray is not usually eaten.

More photos

Giant moray (Gymnothorax javanicus) — Muraenidae — 2
iNaturalist ((c) myxograzina, some rights reserved (CC BY-NC))
Giant moray (Gymnothorax javanicus) — Muraenidae — 3
iNaturalist ((c) Roxanne Lazarus, some rights reserved (CC BY-NC))
Giant moray (Gymnothorax javanicus) — Muraenidae — 4
iNaturalist ((c) Roxanne Lazarus, some rights reserved (CC BY-NC))
Giant moray (Gymnothorax javanicus) — Muraenidae — 5
Curtis Hart (CC BY-NC 4.0) via GBIF — iNaturalist
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All data

Identification

English name
Giant moray sourced
Scientific name
Gymnothorax javanicus
Family
Muraenidae
Other names
Giant moray; Blackpearl moray; Java moray eel; Moray eel; Tropical moray eel verified

Appearance

Size class
Extra large verified
Max length (cm)
300.0 verified
Body shape
Snake-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)
0.0 verified
Max depth (m)
50.0 verified
Natural range
Asia: American Samoa, Australia, Brunei Darsm, Sri Lanka, Taiwan/Ch Taipei, Christmas I. and others sourced
Origin
Native inferred

Behaviour & biology

Social behaviour
Solitary inferred
Territorial
No inferred
Activity
Nocturnal sourced
Reproduction
Separate sexes inferred
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred
Special features
Note: in tropical areas this species can cause ciguatera poisoning when eaten; large specimens of coral reef predators can accumulate the toxin. Eat with care or avoid in risk areas. verified

For anglers

Edibility
Not eaten sourced
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
Venomous / poisonous verified
First aid
Large specimens can carry ciguatera, a food-chain toxin not destroyed by cooking; do not eat. For poisoning (tingling, reversed hot-cold sensation, gastrointestinal symptoms): seek medical help. This large moray can also bite fiercely; do not reach into crevices with bare hands. 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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