What is deeper oceans or sea?

Oceans are deeper than seas. This is because oceans are the largest bodies of water on Earth, and seas are smaller bodies of water that are partially enclosed by land. The average depth of the ocean is about 3,700 meters (12,100 feet), while the average depth of the sea is about 1,200 meters (3,900 feet). The deepest point in the ocean is the Mariana Trench, which is about 11,000 meters (36,000 feet) deep.