Ocean ocean loop Saline water covers approximately 360,000,000 km2 (140,000,000 sq mi) and is customarily divided into several principal oceans and smaller seas, with the ocean covering approximately 71% of Earth's surface and 90% of the Earth's biosphere. Journal · 05 · 02+♥ 588 Last update at 02 · 05 · by milo ‧‧‧ One of 1220Ocean More in Ocean Home Ocean ocean loop PIFTW