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") native to the waters of the
North Atlantic Ocean around
Canada,
Greenland,
Norway, and
Iceland. These sharks live farther north than any other shark species. Many of the species' adaptations are due to it being the only truly sub-Arctic species of shark. They are closely related to the
Pacific sleeper shark. The species has the most toxic meat of any shark.