Lamniformes include a rare species of deep-sea shark.
The goblin shark ( Mitsukurina owstoni ) is a rare species of deep-sea shark . Lamniformes . It includes some of the most familiar species of sharks , such as the great white shark , as well as more unusual representatives , such as the goblin shark and the megamouth shark . The viper dogfish or viper shark ( Trigonognathus kabeyai ) is a rare species of dogfish shark in the family Etmopteridae , and the only extant member of its genus .