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Fish Identification: Find Species

Class: Elasmobranchii
Order: Squaliformes
Family: Somniosidae Sleeper sharks

Genus: Somniosus

(See list of species below)

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5 species in
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South Indo-Pacific and So
Max. Length 438 cm TL
Somniosus antarcticus Whitley, 1939

Photo by Photo by Reyes, P.
Somniosus antarcticus
[Southern sleeper shark]
No picture found

Max. Length 130.1 cm TL

Somniosus longus

Arctic and North Atlantic
Max. Length 550 cm TL
Somniosus microcephalus (Bloch & Schneider, 1801)

Photo by Photo by FAO
Somniosus microcephalus
[Greenland shark]

North Pacific and Arctic
Max. Length 440 cm TL
Somniosus pacificus Bigelow & Schroeder, 1944

Photo by Photo by Gadig, O.B.F.
Somniosus pacificus
[Pacific sleeper shark]

Northeast Atlantic
Max. Length 143 cm TL
Somniosus rostratus (Risso, 1827)

Photo by Photo by Cambraia Duarte, P.M.N. (c)ImagDOP
Somniosus rostratus
[Little sleeper shark]

5 species

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Scientific Name English Name Distribution Max. Length (cm) Year
Somniosus antarcticus Southern sleeper shark South Indo-Pacific and So 438 TL 1939
Somniosus longus Western Pacific 130.1 TL 1912
Somniosus microcephalus Greenland shark Arctic and North Atlantic 550 TL 1801
Somniosus pacificus Pacific sleeper shark North Pacific and Arctic 440 TL 1944
Somniosus rostratus Little sleeper shark Northeast Atlantic 143 TL 1827

Other identification tools in FishBase

Quick Identification
Identification keys
Identification by morphometrics
Identification by pictures:
          If you already know the Family, go to Search FishBase, select Family and click on 'Identification by pictures' to display all available pictures in FishBase for the family.

          If you already know the Country, go to
Search FishBase, select Country and click on 'Identification by pictures' to display all available pictures in FishBase for the country.

          If you already know the Ecosystem, go to
Search FishBase, select Ecosystem and click on 'Identification by pictures' to display all available pictures in FishBase for the ecosystem.
cfm script by eagbayani, 30.11.04, ,  php script by cmilitante, 05/11/2010 ,  last modified by cmilitante, 14/03/2013