The ocean is a vast body of saltwater that covers about 71% of the Earth's surface. It is divided into five main oceans: 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, including fish, mammals, and coral reefs. Oceans are essential for human life, providing food, transportation, and recreation. They also absorb carbon dioxide, helping to mitigate climate change. The ocean's currents and tides are influenced by the moon and sun, affecting weather patterns and ecosystems around the world.