Japonoconger Sivicolus (Japonoconger sivicolus), first described by Matsubara & Ochiai, 1951 is a large fish in the family Congridae (order Anguilliformes). Adults typically reach 57.00 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 300 to 535 metres. It occurs in Deep-water waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. On the IUCN Red List, it is classified as Least Concern.
Anal soft rays: 159 - 164. Tail progressively becoming narrower posteriorly, tip flexible. Upper lip without upturned labial flange. Skin very thick . Head small, with short dermal papillae. Snout long and blunt, protruding beyond mouth. Mouth large, the gape reaching to a vertical through posterior margin of the eye. Dorsal origin before pectoral fin base. Pectoral fin short. Body uniformly dark brown .: eel-like; Cross section: compressed.
Behavioural data for Japonoconger Sivicolus is currently being reviewed.
Marine; bathydemersal; depth range 300 - 535 m . Deep-water Northwest Pacific: Japan.
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