Genus
Lamna
Lamna ditropis. Photo: (c) Dr Cherisse Du Preez, some rights reserved (CC BY-NC)
Lamna is a genus of mackerel sharks in the family Lamnidae, containing two extant species: the porbeagle (L. nasus) of the North Atlantic and Southern Hemisphere, and the salmon shark (L. ditropis) of the North Pacific.