Phoca vitulina; Print; The harbor (or harbour) seal (Phoca vitulina); also known as the common seal; is a true seal found along temperate and Arctic marine coastlines of the Northern Hemisphere. The most widely distributed species of pinniped (walruses; eared seals; and true seals); they are found in coastal waters of the northern Atlantic and Pacific Oceans and the Baltic and North Seas.; 1700-1880