Shortspine thornyhead (Sebastolobus alascanus) fish species and information / pictures of Shortspine thornyhead - Sebastolobus alascanus

Shortspine thornyhead (Sebastolobus alascanus) fish species information

Scientific Name
Sebastolobus alascanus

Common Name
Shortspine thornyhead

Biology
Very common on soft bottoms (Ref. 2850). Oviparous (Ref. 205). Eggs are extruded in floating gelatinous masses (Ref. 31279). Have a thick glandular tissue on posterior margin of fin spines which is believed to be venomous (Ref. 57406). Rarely taken by game fishers (Ref. 27436). Flesh sweeter than that of other rockfishes (Ref. 27436).

Classification

Classified By
Bean, 1890
Class
Ray-finned fishes (Actinopterygii)
Order
Scorpionfishes and Flatheads (Scorpaeniformes)
Family
Rockfishes, rockcods and thornyheads (Sebastidae)

Distribution

Region
North Pacific
Distribution
North Pacific: Sea of Okhotsk north to the Navarin Canyon in the Bering Sea and from Stalemate Bank and Ulm Plateau in the Aleutian Islands southeast to Cedros Island, Baja California, Mexico. Reported from Japan (Ref. 559).
Range
Unknown

Environment

Climate
Deep-water
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
17 m
Depth To - meters
1600 m
Zone
bathydemersal
Environment
Marine; bathydemersal; depth range 17 - 1600 m (Ref. 50550), usually 91 - ? m (Ref. 2850)
Trophic Level
3.61 s.e. 0.58 Based on diet studies.
Occurs in Marine / Salt water
True
Occurs in Brackish water
False
Occurs in Fresh Water
False
Occurs on Reefs
False
Is kept in Aquariums
False

Physical Size and Genetics

Maximum Length
80.0 cm
Common Length
Unknown cm
Phylogenetic Diversity Index
PD50 = 0.6250 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses
Fisheries: minor commercial
Vulnerability
High to very high vulnerability (70 of 100)
Resilience
Very Low, minimum population doubling time more than 14 years (tmax: 115 (validated age: 62 yrs); tm=41; Fec > 10,000)
Threat To Humans
  Venomous (Ref. 57406)
IUCN Red List Status
  Endangered (EN) (A2d)