A term used to collectively refer to the fairly shallow Barents Sea and three deep ocean regions: the Norwegian Sea, the Greenland Sea and the Iceland Sea. The deep parts of the latter three are separated from another by deep submarine ridges. The Nordic Seas are separated from the North Atlantic to the south by the Greenland–Scotland Ridge, and are connected to the Arctic Ocean to the north via the 2200 m deep Fram Strait. The Nordic Seas along with the Arctic Ocean are collectively referred to as the Arctic Mediterranean.