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🌊 Marine Data Deficient 🌡️ Deep-water

Dusky snout catshark

Bythaelurus naylori Ebert & Clerkin, 2015
Max Length
51.1 cm
Max Weight
-
Lifespan
-
Trophic Level
4.4
Depth
89–1443 m
Climate
Deep-water
Resilience
Low
Vulnerability
28.00/100
Typical Length
-
Depth Zone
deep-water

📖 Overview

Collected by bottom trawls and midwater trawls. Maturity size for females at 48.1 cm TL and are immature at 43.0 cm TL, males at 45.2 cm and immature at 38.0 cm TL .

Scientific Name
Bythaelurus naylori
Authority
Ebert & Clerkin, 2015
Habitat
Marine
Climate
Deep-water
Body Shape
Elongated
IUCN Status
DD
Max Length
51.1 cm
Depth Range
89–1443 m
Trophic Level
4.4
Resilience
Low
Vulnerability
28.00/100
Salinity
30–40 ppt

🐟 Physical Description

Vertebrae: 114 - 128. This moderately-sized species is distinguished by the following set of characters: short snout and bluntly rounded; preoral length 4.2-5.5% TL; oral cavity without papillae on the roof of the mouth and tongue; anal-fin base length is equal to or less than 1.5 times second dorsal-fin base length; upper caudal-fin margin with distinct enlarged dermal denticles; body colouration uniformly plain medium to dark brown, with light fin edges and a distinct dark dusky-colored snout ..: elongated; Cross section: angular.

🌀 Behaviour

Behavioural data for Dusky snout catshark 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; depth range 89 - 1443 m . Deep-water; 33°S - 37°S, 55°E - 56°E Southwest Indian Ridge.

🌿 Ecology

Zone Preferences
🌊 Marine 🌑 Deep Water ⬇️ Benthic
Trophic Level
4.4±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.00347 × L3.09 (TL)
Max TL
51.1cm
Vertebrae
121

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
28.00/100
Low vulnerability
Trophic Level
4.4
Apex / Top predator
Body Shape
Elongated
Climate Zone
Deep-water
Described By
Ebert & Clerkin, 2015

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