Before revision: The depth majority of the ocean is aphotic, with the average depth of the sea being 4267 m deep with the deepest part of the sea, being the Challenger Deep in the Mariana Trench, is about 11,000 m deep.
After revision: The majority of the ocean is aphotic, with the average depth of the sea being 4267 m deep with the deepest part of the sea, being the Challenger Deep in the Mariana Trench, is about 11,000 m deep.