Pacific sleeper shark (Somniosus pacificus)

Scientific name: Somniosus pacificus Bigelow & Schroeder, 1944

Pacific sleeper shark (Somniosus pacificus)

The Pacific sleeper shark (Somniosus pacificus) is a marine fish of the family Somniosidae. Native range: North Pacific.

Biology

Dorsal spines (total): 0; Anal spines: 0; Anal soft rays: 0. Diagnosis: Somniosus pacificus differs from S. antarcticus by the following characters: interdorsal space about 70% of prebranchial length (vs. 80%); height of first dorsal fin about 3.7% of precaudal length (PCL) (vs. 3.0%); height of second dorsal fin about 3.4% of PCL (vs. 2.9%); number of turns in spiral valve 32-37 (mode 33) (vs. 36-41, mode 39); precaudal vertebrae 28-30 (mode 29) (vs. 30-31, mode 30).

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name
Somniosus pacificus
Family
Somniosidae (Sleeper sharks)
Order
Squaliformes (Bramble, Sleeper and Dogfish sharks)
Class
Elasmobranchii (Sharks and Rays)
Maximum length
440
Depth range
0–2000 m (0–6562 ft)
Environment
Marine; benthopelagic; depth range 0 - 2000 m
Climate
Temperate
Distribution
North Pacific.
Conservation status (IUCN)
Data deficient (DD)
Threat to humans
Harmless
Uses
Fisheries: of no interest
Resilience
Low, minimum population doubling time 4.5 - 14 years (Fec=300; assuming tm

Sources

Taxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.

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