The Pacific sleeper shark, Somniosus pacificus, is a sleeper shark of the family Dalatiidae, found circumglobally on continental shelves and slopes in temperate waters between latitudes 70°N and 47°S, from the surface to 2,000 metres (6,600 ft). Its length is up to 4.4 metres (14 ft), although FishBase accepts that it could possibly reach 7 metres (23 ft).