Far less well-known than the polar bear or the orca, the Greenland shark is, nonetheless, an important top predator of Arctic waters just like them. Greenland sharks can live to up to 400 years! You can find Greenland sharks in the northern Atlantic and Arctic Ocean. Learn more with these factsheets. Greenland Shark - Facts and Adaptations Somniosus microcephalus The largest fish in the Arctic, so strange as to be almost other-worldly. Greenland sharks live mainly in the ocean depths and like some other cold blooded Arctic animals live life in slow motion - for hundreds of years, they are the longest living vertebrates known. The Greenland shark (Somniosus microcephalus), also known as the rubiks shark or grey shark, is a large shark of the family Somniosidae ("sleeper sharks"), closely related to the Pacific and southern sleeper sharks. [2]