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Gymnothorax javanicus (Bleeker, 1859)

Giant moray
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Gymnothorax javanicus   AquaMaps   Data sources: GBIF OBIS
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Image of Gymnothorax javanicus (Giant moray)
Gymnothorax javanicus
Picture by Patzner, R.


Maldives country information

Common names: Doku-utsubo, Giant moray, Kalhu ven
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Also Ref. 5579, 30404, 33390, 81699.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/mv.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Randall, J.E. and C. Anderson, 1993
National Database:

Common names from other countries

Classification / Names Nombres comunes | Sinónimos | Catalog of Fishes(Género, Especie) | ITIS | CoL | WoRMS | Cloffa

> Anguilliformes (Eels and morays) > Muraenidae (Moray eels) > Muraeninae
Etymology: Gymnothorax: Greek, gymnos = naked + Greek, thorax, -akos = breast (Ref. 45335).
  More on author: Bleeker.

Environment: milieu / climate zone / depth range / distribution range Ecología

marino asociado a arrecife; rango de profundidad 0 - 50 m (Ref. 30573).   Tropical; 30°N - 25°S

Distribución Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri

Indo-Pacific: Red Sea and East Africa (Ref. 33390) to the Marquesas and Oeno Atoll (Pitcairn Group), north to the Ryukyu and Hawaiian islands, south to New Caledonia and the Austral Islands.

Tamaño / Peso / Age

Maturity: Lm ?  range ? - ? cm
Max length : 300 cm TL macho / no sexado; (Ref. 9710); peso máximo publicado: 30.0 kg (Ref. 30404)

Short description Claves de identificación | Morfología | Morfometría

Espinas dorsales (total) : 0; Espinas anales: 0; Vértebra: 137 - 143. Juveniles are tan with numerous large black spots. Adults have black specks that grade into leopard-like spots behind the head and a black area surrounding the gill opening.

Biología     Glosario (por ej. epibenthic)

Found in lagoon and seaward reefs. Commonly seen species along deep drop-offs and slopes in Indonesian waters (Ref. 48635). Benthic (Ref. 58302). Juveniles more secretive and occur on intertidal reef flats (Ref. 37816). It feeds primarily on fishes and occasionally on crustaceans. This is the largest Indo-Pacific moray eel (Ref. 30404), perhaps reaching 3 m in length. Because of its position at the top of the reef's food chain it is often ciguatoxic. Attacks humans when provoked (Ref. 3132). Minimum depth reported taken from Ref. 10713. Solitary in reef holes (Ref 90102).

Life cycle and mating behavior Maturities | Reproducción | Spawnings | Egg(s) | Fecundities | Larva

Observations on prespawning behavior include a pair entwined around one another lying on the bottom of the reef area (Ref. 93344).

Main reference Upload your references | Referencias | Coordinador | Colaboradores

Chen, H.-M., K.-T. Shao and C.T. Chen, 1994. A review of the muraenid eels (Family Muraenidae) from Taiwan with descriptions of twelve new records. Zool. Stud. 33(1):44-64. (Ref. 6934)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 17 August 2011

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Reports of ciguatera poisoning (Ref. 4690)




Human uses

Pesquerías: pesquerías de subsistencia; Acuario: Acuarios públicos
FAO(Publication : search) | FishSource | Sea Around Us

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Trophic ecology
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Fuentes de Internet

Estimates based on models

Preferred temperature (Ref. 115969): 25.5 - 29, mean 28.1 (based on 902 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00052 (0.00033 - 0.00084), b=3.27 (3.14 - 3.40), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Nivel trófico (Ref. 69278):  3.9   ±0.64 se; based on food items.
Resiliencia (Ref. 120179):  Alto, población duplicada en un tiempo mínimo inferior a 15 meses (Fec = 200,000-300,000).
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (90 of 100).
Price category (Ref. 80766):   Medium.