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Ocean

An ocean (the World Ocean of classical antiquity) is a body of saline water that composes much of a planet's hydrosphere. On Earth, an ocean is one of the major conventional divisions of the World Ocean, which occupies two-thirds of planet's surface. These are, in descending order by area, the Pacific, Atlantic, Indian, Southern (Antarctic), and Arctic Oceans. [Ocean. Wikipedia]
Ocean
Ocean, ocean, sea,