geometric moray

Scientific name Gymnothorax griseus
Descriptor Lacepède
Year of description 1803
IUCN category LC
Family Muraenidae
Genus Gymnothorax
Gymnothorax griseus Gymnothorax griseus


Gymnothorax griseus, commonly known as geometric moray, is a salt water fish.

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Who is it?


  • Average size
    50 cm
  • Maximum size
    65 cm
  • Longevity
    30 year
  • Mimicry
    rocky bottoms
  • Pattern
  • Average size
    50 cm
  • Maximum size
    65 cm
  • Longevity
    30 year
  • Mimicry
    rocky bottoms
  • Pattern

How to recognize the geometric moray ?

The geometric moray measures between 50 and 65 cm. This fish is bicolore with a predominantly noir, blanc and gris body. The also has noir ponctuations.

Behaviour & Life cycle

  • diet
  • Sociability
  • territorial
  • Way of living

The geometric moray hunts in the stalk and is one of the predators of its biotope. Opportunistic, it does not hesitate to attack any smaller animal nearby.

The geometric moray is a fish solitary naturally found near the rocks. This species is carnivorous . This fish lives mainly at night. Usually, it leaves its hiding place and starts to be active once it gets dark.

The geometric moray is a territorial animal that does not tolerate any incursions into its living area. It is particularly virulent against other territorial species and it can provoke heated fights.


  • Reproduction
  • Hermaphrodite

The geometric moray is a fish ovipare.

Harmless species

This species does not represent any particular threats to humans when encountered in its natural environment.

Where to find it?

What is its habitat?

Natural environment characteristics

  • Temperature
    24 - 28 °C
  • Depth
    0 - 40 m
  • Flow

Biotope presentation

The geometric moray is most often found at a depth between 0m and 40m. However, it is not impossible to find this species at other depths.

Species of the same biotope

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Species of the same family

To read on the web

Sources & Contributions

Participation & Validation

The Fishipedia team and specialist contributors are committed to providing high-quality content. However, although the information comes from scientific sources or testimonials from specialists, the cards may contain inaccuracies.


Translation done with the valuable contribution of our translators, who make this information available to a wider audience. We sincerely thank them for their commitment.

Bibliographic references

A new species of Short Brown Unpatterned Moray Eel of the Genus Gymnothorax (Anguilliformes: Muraenidae) from the Bay of Bengal - DIPANJAN RAY - ANIL MOHAPATRA - DAVID G. SMITH - ZOOTAXA - 2015.

First record of the moray eel Gymnothorax reticularis, Bloch, 1795 in the Mediterranean Sea, with a note on its taxonomy and distribution - NIR STERN - MENACHEM GOREN - ZOOTAXA - 2013.

The Moray Eel Fishery in the Seagrass Beds of Siquijor Island, Central Philippines, with Remarks on Two New Philippine Records of the Genus Gymnothorax - BILLY T. WAGEY - ABNER A. BUCOL - VIVIE KATUUK - International Peer Reviewed Journal - 2015.

A Feeding Association between the Grouper Epinephelus fasciatus and the Moray Eel Gymnothorax griseus - Ilan Karplus - Copeia - 1978. (Vol. 1978, No. 1)

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Species of the same family

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