This is a list of seas of the World Ocean, including marginal seas, areas of water, various gulfs, bights, bays, and straits. In many cases it is a matter of tradition for a body of water to be named a sea or a bay, etc., therefore all … See more

The largest terrestrial seas, in decreasing order of area, are:
1. Philippine Sea – 5.695 million km (2.199 million sq mi)
2. Coral Sea – 4.791 million km (1.850 million sq mi)
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While all other seas in the world are defined at least in part by land boundaries, there is only one sea which is defined only by ocean currents:
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• Ocean – the four to seven largest named bodies of water in the World Ocean, all of which have "Ocean" in the name (see: Borders of the oceans for details).
• Sea has several definitions:
• River – a narrow strip of water that flows over land from a … See more

Seas may be considered marginal between ocean and land, or between oceans in which case they may be treated as marginal parts of either. There is no single ultimate … See more

Entities called "seas" which are not divisions of the World Ocean are not included in this list. Excluded are:
• Lakes, … See more