Kendra Polk

A sea is a large body of salt water. There are particular seas and the sea. The sea commonly refers to the Ocean, the interconnected body of seawaters that spans most of Earth. Particular seas are either marginal seas, second-order sections of the oceanic sea, or certain large, nearly landlocked bodies of water.The salinity of water bodies varies widely, being lower near the surface and the mouths of large rivers and higher in the depths of the ocean; however, the relative proportions of dissolved salts vary little across the oceans.