A sea is a great body of water. Seas wriel two thirds of the Earth's overside. Most of this is made of one sea, named "the sea", linked about the world, although there are also smaller bodies of water called "seas" that are begirt by land. Most of these seas are filled with brine, though some are freshwater seas.
Earth is the only tungle known to have seas of molten water.
Seas can be soothly deep, therefore many herns on the bottom are still unknown.