Known for its distinctive, protruding jaw and pink skin, the goblin shark is a deep-sea dweller that remains one of the ocean's most elusive species.
With tentacles that can reach up to 43 feet in length, the giant squid has been the subject of maritime legends for centuries.
Despite its name, the vampire squid is neither a true squid nor an octopus.
Once thought to be extinct and only known from fossils, the coelacanth is a rare prehistoric fish that was rediscovered alive in 1938.
Named for its ear-like fins that resemble the ears of Disney's Dumbo, the Dumbo octopus lives at extreme depths and is known for its peculiar appearance and behavior.
This rare shark resembles a sea serpent with its elongated, eel-like body and frilly gills. It's a living fossil, reflecting an ancient lineage of sharks.
Found along the southern and western coasts of Australia, the leafy seadragon is a master of camouflage, with leaf-like appendages that allow it to blend in with seaweed and kelp.
Discovered in 2009 near Indonesia, this rare fish has a psychedelic pattern of swirling concentric circles on its body and uses its fins to "walk" along the ocean floor.
Often called the "unicorn of the sea," the narwhal is known for the long, spiral tusk protruding from its head.
These tube worms are found near hydrothermal vents on the ocean floor, thriving in extreme conditions of temperature and pressure.