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🌊 Marine Least Concern 🌡️ Tropical

Steven's swellshark

Cephaloscyllium stevensi Clark & Randall, 2011
Max Length
66 cm
Max Weight
-
Lifespan
-
Trophic Level
4.1
Depth
240–274 m
Climate
Tropical
Resilience
Low
Vulnerability
52.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

Steven's swellshark (Cephaloscyllium stevensi) is a ray-finned fish of the family Scyliorhinidae. It inhabits marine (saltwater) waters in pelagic environments. This species can reach a maximum total length of 66 cm. It occurs at depths between 240 and 274 metres. With a trophic level of 4.1, it is a mid-level predator. It is assessed as Least Concern on the IUCN Red List.

Scientific Name
Cephaloscyllium stevensi
Authority
Clark & Randall, 2011
Habitat
Marine
Climate
Tropical
Body Shape
Elongated
IUCN Status
LC
Max Length
66 cm
Depth Range
240–274 m
Trophic Level
4.1
Resilience
Low
Vulnerability
52.00/100
Salinity
30–40 ppt

🐟 Physical Description

Similar to its congeners, this species is most easily distinguished by its color pattern: gray-brown above, whitish ventrally, mottled with brown and whitish spots of variable size over head and body, including ventrally; 6 large dark brown saddle blotches dorsally on head and body and 3 on caudal fin; first four dorsal dark blotches connecting or leading obliquely to other dark blotches below; small white spots most distinct within or at edges of dark brown blotches .: elongated.

🌀 Behaviour

Behavioural data for Steven's swellshark 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; pelagic-neritic; depth range 240 - 274 m . Tropical

🌿 Ecology

Zone Preferences
🌊 Marine 🐟 Pelagic
Trophic Level
4.1±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.00269 × L3.21 (TL)
Max TL
66cm

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
52.00/100
Moderate-High vulnerability
Trophic Level
4.1
Apex / Top predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Clark & Randall, 2011

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