why is the goblin shark a living fossil
The goblin shark (Mitsukurina owstoni) is a rare species of deep-sea shark. Sometimes called a  living fossil , it is the only extant representative of the family Mitsukurinidae, a lineage some 125 million years old.This pink-skinned animal has a distinctive profile with an elongated, flattened snout, and highly protrusible jaws containing prominent nail-like teeth.t is usually between 3 and 4 m (10 and 13 ft) long when mature, though it can grow considerably larger. Goblin sharks inhabit upper continental slopes, submarine canyons, and seamounts throughout the world at depths greater than 100 m (330 ft), with adults found deeper than juveniles.