Claim: The Greenland shark is closely related to the Atlantic sleeper shark.
Evidence: The Greenland shark -LRB- Somniosus microcephalus -RRB- , also known as the gurry shark , or grey shark , or by the Inuit name eqalussuaq , is a large shark of the family Somniosidae -LRB- `` sleeper sharks '' -RRB- , closely related to the Pacific and southern sleeper sharks.