By Bob Goemans
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Gymnothorax undulatus

(Lacepede, 1803)

Undulated Moray

Not Reef Tank Suitable

Not Suitable for Fish-Only Tank

Range: Indo-West Pacific Ocean: Red Sea and East Africa, north to Southern Japan and the Hawaiian Islands, and south to the Great Barrier Reef, including the Eastern Pacific Ocean: Costa Rica and Panama.

Size: 58 inches (145 cm)

Natural Environment: Inhabits lagoons, and reef flats at depths between 30 to about 300 feet (10 – 90 m) and stays under rocks and/or in caves during daytime and hunts prey during evening hours when it feeds mainly on smaller fishes and crustaceans.

General Husbandry: Quite drab, having a heavily mottled blackish body. Not collected for the trade.


    Order: Anguilliformes

    Suborder: Muraenoidei

    Family: Muraenidae

    Subfamily: Muraeninae

    Genus: Gymnothorax

FYI: Shown here for identification only. Best left in the wild. Unsuitable for home aquariums. Used in Chinese medicine.

 Gymnothorax undulatus (Undulated Moray)
Photo © John Randall
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