The smallest and shallowest of the five major oceans in the world, the Arctic Ocean is also the ocean with the least amount of salt in water by volume of water. It encompasses 5.427 million square miles. It incorporates several islands, including Greenland and Shoe Island. The largest white mass on this map between longitudes 30 degrees and 40 degrees is Greenland. Between 90 degrees and 120 degrees longitude encompasses the North American continent.