The ocean basin is a vast area of water that covers most of the earth's surface. It is a critical part of our planet, supporting an abundance of life and regulating our climate. There are many synonyms for the term, including the world ocean, the global ocean, the sea, and the deep blue. Each of these terms describes the same vast expanse of saltwater that surrounds us. Other synonyms for "ocean basin" include the marine environment, the aquatic realm, and the deep sea. No matter what term you use, the ocean basin remains one of the most vital aspects of our world's ecosystem.