The largest ocean on Earth is the Pacific Ocean. Covering more than 63 million square miles (165 million square kilometers), it accounts for about one-third of the Earth's surface. The Pacific Ocean is bordered by countries on the western edge, such as Asia and Australia, and on the eastern side, it stretches to the Americas. It is not only the largest ocean but also the deepest, with the Mariana Trench reaching depths of approximately 36,000 feet (around 11,000 meters). The Pacific Ocean is vital for global weather patterns, trade routes, and biodiversity, housing countless marine species.