Ocean

Ocean (from Okeanos, a Greek god of sea and water; Greek ??ea???) covers almost three quarters (71%) of the surface of the Earth, and almost half of the world's marine waters are over 3000 m deep.

This global, interconnected body of salt water, called the World Ocean, is separated by the continents and archipelagos into the following four bodies, from the largest to the smallest: the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, and the Arctic Ocean, and, according to some authorities such as International Hydrographic Organization(IHO), a fifth ocean, the Southern Ocean.