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🌊 Marine Data Deficient 🌡️ Deep-water

Robin's ghostshark

Hydrolagus erithacus Walovich, Ebert & Kemper, 2017
Max Length
132 cm
Max Weight
-
Lifespan
-
Trophic Level
4
Depth
470–1000 m
Climate
Deep-water
Resilience
Very low
Vulnerability
79.00/100
Typical Length
-
Depth Zone
deep-water

📖 Overview

This species is likely to occur beyond 2,000 meters. Fragments of possible crab appendages recovered from a digestive tract indicate a diet of crustaceans and other benthic fauna .

Scientific Name
Hydrolagus erithacus
Authority
Walovich, Ebert & Kemper, 2017
Habitat
Marine
Climate
Deep-water
Body Shape
Elongated
IUCN Status
DD
Max Length
132 cm
Depth Range
470–1000 m
Trophic Level
4
Resilience
Very low
Vulnerability
79.00/100
Salinity
30–40 ppt

🐟 Physical Description

This species is distinguished from its congeners by the following set of characters: bulky and relatively large head is followed by a stocky body; head and body height consistent from about pectoral fin origins to pelvic fin origins, until the insertion of the pelvic fins, tapering rapidly to filamentous tail; height of first dorsal fin spine about equal to or slightly less than first dorsal fin apex height; second dorsal fin up to 81% of total body length, uniform in height, and equal to dorsal caudal fin height; paired claspers trifurcate, forked for approximately 20% of total length with fleshy, bulbous tips; prepelvic tenaculae with 5-7 medial spines; robust frontal tenaculum, nearly uniform in width; color when preserved uniform black with no distinct markings .: elongated; Cross section: angular.

🌀 Behaviour

Behavioural data for Robin's ghostshark 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; bathydemersal; depth range 470 - 1000 m . Deep-water; 39°S - 47°S Indian oceans: Discovery Seamount.

🌿 Ecology

Zone Preferences
🌊 Marine 🌑 Deep Water
Trophic Level
4±0.6

📐 Morphometrics

Length–Weight Relationship: W = 0.00331 × L3.07 (TL)
Max TL
132cm

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
Very low
Minimum doubling time
Fishing Vulnerability
79.00/100
Very High vulnerability
Trophic Level
4
Apex / Top predator
Body Shape
Elongated
Climate Zone
Deep-water
Described By
Walovich, Ebert & Kemper, 2017

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