noun - The goblin shark is a rare, poorly understood 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 species looks unlike any other shark, with an elongated, flattened snout, highly protrusible jaws containing prominent nail-like teeth, and pink coloration. It is usually between 3 and 4 meters (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.