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🌊 Marine Data Deficient 🌡️ Deep-water

Eptatretus Walkeri

Eptatretus walkeri McMillan & Wisner, 2004
Max Length
51.8 cm
Max Weight
-
Lifespan
-
Trophic Level
4.2
Depth
75–120 m
Climate
Deep-water
Resilience
Medium
Vulnerability
46.00/100
Typical Length
-
Depth Zone
deep-water

📖 Overview

Eptatretus Walkeri (Eptatretus walkeri), first described by McMillan & Wisner, 2004 is a large fish in the family Myxinidae (order Myxiniformes). Adults typically reach 51.80 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 75 to 120 metres. It occurs in Deep-water waters. Diet is predominantly piscivorous, targeting other fish and larger prey. On the IUCN Red List, it is classified as Data Deficient.

Scientific Name
Eptatretus walkeri
Authority
McMillan & Wisner, 2004
Habitat
Marine
Climate
Deep-water
IUCN Status
DD
Max Length
51.8 cm
Depth Range
75–120 m
Trophic Level
4.2
Resilience
Medium
Vulnerability
46.00/100
Migration
Non-migratory
Salinity
30–40 ppt

🐟 Physical Description

Six pairs of gill pouches (GP) and apertures (GA); GA closely spaced in a linear or slightly irregular pattern; each GA with pale margin. Fused cusps 3/2, total cusps 38-44. Prebranchial slime pores 16-20, total pores 69-79. Ventral finfold poorly developed to vestigial. Eyespots faint or absent .: eel-like.

🌀 Behaviour

Behavioural data for Eptatretus Walkeri is currently being reviewed.

🦐 Diet

small fish
crustaceans
cephalopods

🥚 Reproduction

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

🌍 Habitat & Distribution

Marine; demersal; non-migratory; depth range 75 - 120 m . Deep-water Northwest Pacific: Japan and Korea.

🌿 Ecology

Zone Preferences
🌊 Marine 🌑 Deep Water ⬇️ Benthic
Migration
Non-migratory
Trophic Level
4.2±0.7

📐 Morphometrics

Length–Weight Relationship: W = 0.00204 × L2.93 (TL)
Max TL
51.8cm

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2009

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
46.00/100
Moderate-High vulnerability
Trophic Level
4.2
Apex / Top predator
Climate Zone
Deep-water
Described By
McMillan & Wisner, 2004

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