Cetorhinus Blainville, 1816
Diagnosis: 5 extremely long gill-slits, starting on the back almost at the midline and running round to under the throat; gill arches with bristlelike rakers; teeth minute and very numerous; nostrils widely separated from mouth. Caudal fin nearly asymmetrical, with lower lobe well developed; caudal peduncle with strong keels on sides. Colour: back greyishbrown to slate-grey or blackish, belly similar or lighter, often with light patches or bands on belly and under snout. Size: males to about 9 m, females to 9.8 m TL (reported to reach 15.2 m).
Habitat: epipelagic, oceanic, migrating towards the coast in summer. Food: planktonic organisms, mainly minute crustaceans. Reproduction: viviparous; apparently about 160 cm at birth; gestation period assumed long (3 1/2 years).
Distribution: eastern North Atlantic, from Iceland, Norway and West Barents Sea southward to Mediterranean. Elsewhere, in boreal, temperate and warm temperate seas.
Species 1.
Species of this genus in the program:
Cetorhinus maximus