The ocean is a vast body of saltwater that covers about 71% of the Earth's surface. It is divided into five main regions: the Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern Ocean, and Arctic Ocean. The ocean plays a crucial role in regulating the planet's climate and supports a diverse range of marine life. Oceans are home to countless species, from tiny plankton to large mammals like whales. They provide essential resources, including food and oxygen, and are vital for global trade and transportation. The ocean also influences weather patterns and is a key component of the Earth's ecosystem.