Before revision: Definition 400px|Oceans and marginal seas as defined by the International Maritime Organization The sea is the interconnected system of all the Earth's oceanic waters, including the Atlantic, Pacific, Indian, Southern and Arctic Oceans."Sea."
After revision: TOC level|3Definition 400px|Oceans and marginal seas as defined by the International Maritime Organization The sea is the interconnected system of all the Earth's oceanic waters, including the Atlantic, Pacific, Indian, Southern and Arctic Oceans."Sea."