Gymnothorax polyuranodon (Bleeker, 1854)
Freshwater moray
Gymnothorax polyuranodon
photo by Pöllabauer, C.

Family:  Muraenidae (Moray eels), subfamily: Muraeninae
Max. size:  150 cm TL (male/unsexed)
Environment:  demersal; freshwater; brackish; marine; depth range - 10 m, catadromous
Distribution:  Indo-Pacific: Sri Lanka, Indonesia, Borneo, New Guinea, Philippines and Fiji. Reported from Palau (Ref. 6371), Australia (Ref. 7300), New Caledonia (Ref. 13246, 13235) and Vanuatu (Ref. 87781).
Diagnosis:   
Biology:  Occurs in lentic and lotic freshwater (Ref. 7300) and found in estuarine and marine habitats (Ref. 6028). Usually found within 20-30 km of the sea at a maximum elevation of about 30-40 m (Ref. 2847, 44894).
IUCN Red List Status: Least Concern (LC); Date assessed: 13 February 2019 Ref. (130435)
Threat to humans:  reports of ciguatera poisoning
Country info:  Collected from Saub River, Cotabato in 1923. Reported from Craan R., Cotabato; a brook at San Ramon Penal Colony, Zamboanga; and Canigaran, Palawan (Ref. 280). Also Ref. 7050.


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