The ocean bordered to the west by the Americas is the Pacific Ocean. This vast body of water is the largest and deepest ocean on Earth, stretching from the Arctic in the north to the Southern Ocean in the south. It covers more than 63 million square miles and features a diverse range of marine ecosystems and geographic features, such as deep-sea trenches and numerous islands. The Pacific Ocean plays a significant role in global climates and weather patterns, influencing conditions across the Americas and beyond.