New 🐟 Mercury Safety Guide & Omega-3 Rankings Updated for 2026. View Omega-3 Rankings →

🌊 Marine Least Concern 🌡️ Deep-water

Japonoconger Sivicolus

Japonoconger sivicolus Matsubara & Ochiai, 1951
Max Length
57 cm
Max Weight
-
Lifespan
-
Trophic Level
3.9
Depth
300–535 m
Climate
Deep-water
Resilience
Medium
Vulnerability
42.00/100
Typical Length
-
Depth Zone
deep-water

📖 Overview

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.

Scientific Name
Japonoconger sivicolus
Authority
Matsubara & Ochiai, 1951
Habitat
Marine
Climate
Deep-water
IUCN Status
LC
Max Length
57 cm
Depth Range
300–535 m
Trophic Level
3.9
Resilience
Medium
Vulnerability
42.00/100
Salinity
30–40 ppt

🐟 Physical Description

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.

🌀 Behaviour

Behavioural data for Japonoconger Sivicolus is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

🌍 Habitat & Distribution

Marine; bathydemersal; depth range 300 - 535 m . Deep-water Northwest Pacific: Japan.

🌿 Ecology

Zone Preferences
🌊 Marine 🌑 Deep Water
Trophic Level
3.9±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.00062 × L3.19 (TL)
Max TL
57cm
Anal Rays
162

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2011

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
42.00/100
Moderate vulnerability
Trophic Level
3.9
Predator
Climate Zone
Deep-water
Described By
Matsubara & Ochiai, 1951

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Japonoconger Sivicolus ↗
Suggest an Edit

Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.

Link to a scientific paper, FishBase, or other authoritative source
Report an Issue

Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.