HomeFish encyclopediaRay-finned fishesEels and MoraysPike congersDuckbill conger Duckbill conger (Gavialiceps javanicus) Scientific name: Gavialiceps javanicus Karmovskaya, 1993 The Duckbill conger (Gavialiceps javanicus) is a marine fish of the family Muraenesocidae. Native range: Indo-West Pacific, Java, Indonesia and northwestern Australia. BiologyDark brown, the back is darker than the belly. Peritoneum, gill and mouth cavities are dark and show through the skin. Stomach is bright, does not reach above the anus, its length is 2.1 times the length of the head.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGavialiceps javanicusFamilyMuraenesocidae (Pike congers)OrderAnguilliformes (Eels and Morays)ClassActinopterygii (Ray-finned fishes)Maximum length89.0Depth range560–600 m (1837–1969 ft)EnvironmentMarine; bathydemersal; depth range 560 - 600 mClimateDeep-waterDistributionIndo-West Pacific: Java, Indonesia and northwestern Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026