Animalia > Chordata > Elasmobranchii > Squaliformes > Somniosidae > Somniosus > Somniosus pacificus

Somniosus pacificus (Pacific Sleeper Shark; Sleeper shark; Southern sleeper shark)

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Wikipedia Abstract

The Pacific sleeper shark (Somniosus pacificus) is a sleeper shark of the family Somniosidae, found in the North Pacific on continental shelves and slopes in Arctic and temperate waters between latitudes 70°N and 22°N, from the surface to 2,000 metres (6,600 ft) deep. Records from southern oceans are likely misidentifications of relatives. Its length is up to 4.4 m (14 ft), although it could possibly reach lengths in excess of 7 m (23 ft).
View Wikipedia Record: Somniosus pacificus

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Gwaii Haanas National Park Reserve II 366714 British Columbia, Canada
Pacific Rim National Park Reserve II 137900 British Columbia, Canada

Prey / Diet

Albatrossia pectoralis (Pectoral rattail)[1]
Anoplopoma fimbria (Skil)[1]
Architeuthis dux (giant squid)[2]
Architeuthis martensi <Unverified Name>[2]
Atheresthes stomias (Turbot)[3]
Enteroctopus dofleini (North Pacific giant octopus)[3]
Eschrichtius robustus (Gray Whale)[1]
Fusitriton oregonensis (Oregon triton)[1]
Gadus chalcogrammus (Whiting)[3]
Gadus macrocephalus (Pacific cod)[1]
Glyptocephalus zachirus (Witch)[3]
Hippoglossoides elassodon (Paper sole)[3]
Hippoglossus stenolepis (Pacific halibut)[3]
Lissodelphis peronii (Southern Right Whale Dolphin)[3]
Microstomus pacificus (Slippery sole)[3]
Oncorhynchus tshawytscha (chinook salmon or king salmon)[1]
Phoca vitulina (Harbor Seal)[3]
Squalus acanthias (Common spiny)[1]

Prey / Diet Overlap

Competing SpeciesCommon Prey Count
Albatrossia pectoralis (Pectoral rattail)1
Alepisaurus ferox (Wolffish)2
Atheresthes evermanni (Kamchatka flounder)1
Balaenoptera acutorostrata (Minke Whale)1
Balaenoptera physalus (Fin Whale)1
Bathyraja aleutica (Aleutian skate)1
Bathyraja maculata (White-blotched skate)1
Callorhinus ursinus (Northern Fur Seal)1
Centroscymnus coelolepis (Portuguese shark)2
Cepphus columba (Pigeon Guillemot)1
Enhydra lutris (Sea Otter)1
Entosphenus tridentatus (Pacific lamprey)1
Eumetopias jubatus (Steller Sea Lion)3
Fratercula cirrhata (Tufted Puffin)1
Haliaeetus leucocephalus (Bald Eagle)1
Hemilepidotus jordani (Yellow Irish lord)1
Hemitripterus bolini (Bigmouth sculpin)3
Hemitripterus villosus (Shaggy sculpin)1
Hexagrammos otakii (Greenling)1
Hippoglossoides dubius (Flathead flounder)1
Lamna ditropis (Salmon shark)1
Megaptera novaeangliae (Humpback Whale)1
Myoxocephalus polyacanthocephalus (Sculpin)1
Orcinus orca (Killer Whale)1
Phoca vitulina (Harbor Seal)1
Physeter macrocephalus (Sperm Whale)3
Physiculus japonicus (Japanese codling)1
Pleurogrammus monopterygius (Atka mackerel)1
Prionace glauca (Tribon blou)2
Raja rhina (Longnose skate)1
Rissa brevirostris (Red-legged Kittiwake)1
Rissa tridactyla (Black-legged Kittiwake)1
Sphyrna zygaena (Smooth hammerhead shark)2
Stenella attenuata (Pantropical Spotted Dolphin)2
Thunnus alalunga (longfinned albacore)2
Uria aalge (Common Murre)1
Xiphias gladius (Swordfish)2


Eumetopias jubatus (Steller Sea Lion)[1]
Homo sapiens (man)[1]


Parasitized by 
Hepatoxylon trichiuri[4]


Alaska (USA); Arctic Ocean; Argentina; Atlantic, Southwest; Australia; Beaufort Sea; Brazil; California Current; Canada; Chukchi Sea; Cuba; East Bering Sea; East Siberian Sea; Gulf of Alaska; Indian Ocean; Indian Ocean, Eastern; Japan; Kamchatka; Kuroshio Current; Laptev Sea; Mexico; Multipeak Seamount; New Zealand; New Zealand Shelf; North Pacific: Japan and along the Siberian coast to the Bering Sea, southern California (USA), and Baja California, Mexico. Sporadic records from the South Pacific (assignment of large southern hemisphere <i>Somniosus</i> to the North Pacific <i>Somnio; North Pacific: Japan and along the Siberian coast to the Bering Sea, southern California (USA), and Baja California, Mexico. Sporadic records from the South Pacific (assignment of large southern hemisphere <i>Somniosus</i> to the North Pacific <i>Somniosus pacificus</i> is tentative) (Ref. 31367). In Australasian waters, it occurs from the seamounts south of Tasmania, the Challenger Plateau (off eastern New Zealand) and possibly from Macquarie Island (Ref. 6871). Southwest Atlantic: off Uruguay (Ref. 35864), Brazil (Ref. 53443) and Argentina (Ref. 58839).; Pacific Ocean; Pacific, Eastern Central; Pacific, Northeast; Pacific, Northwest; Pacific, Southwest; Pacific, Western Central; Russian Federation; Sea of Japan; Sea of Okhotsk; Southeast Australian Shelf; USA (contiguous states); Uruguay; West Bering Sea;



Attributes / relations provided by
1Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
2CephBase - Cephalopod (Octopus, Squid, Cuttlefish and Nautilus) Database
3Diet of Pacific sleeper shark, Somniosus pacificus, in the Gulf of Alaska, Mei-Sun Yang and Benjamin N. Page, Fish. Bull. 97:406–409 (1999)
4Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
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Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access