The Earth's surface is covered by five major oceans: Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern Ocean, and Arctic Ocean. These vast bodies of saltwater play a crucial role in regulating the planet's climate and supporting diverse ecosystems. Each ocean has unique characteristics, such as the Pacific Ocean, which is the largest and deepest, and the Arctic Ocean, known for its icy waters. Together, they cover more than 70% of the Earth's surface, making them essential for global trade, weather patterns, and marine life.