The Greenland shark is in the Somniosidae family.
The Greenland shark ( Somniosus microcephalus ) , also known as the gurry shark , or grey shark , or by the Inuit name eqalussuaq , is a large shark of the family Somniosidae ( `` sleeper sharks '' ) , closely related to the Pacific and southern sleeper sharks . The Somniosidae are a family of sharks in the order Squaliformes , commonly known as sleeper sharks .