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The goblin shark (Mitsukurina owstoni) is a rare, poorly known 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 a long flattened snout, highly protrusible jaws containing prominent nail-like teeth, and pink coloration. It is usually between three and four meters (10–13 ft) long when mature, though can grow considerably larger. Goblin sharks inhabit upper continental slopes, submarine canyons, and seamounts around the world at depths greater than 100 m (330 ft), with adults found deeper than juveniles.

Various anatomical features of the goblin shark, such as its flabby body and small fins, suggest that it is sluggish in nature. This species hunts for teleost fishes, cephalopods, and crustaceans both near the sea floor and in the middle of the water column. Its long snout is covered with ampullae of Lorenzini that enable it to sense minute electric fields produced by nearby prey, which it can snatch up by rapidly extending its jaws. Small numbers of goblin sharks are unintentionally caught by deepwater fisheries. The International Union for Conservation of Nature (IUCN) has assessed it as Least Concern, citing its wide distribution and low incidence of capture.