The largest ocean on Earth is the Pacific Ocean. Covering more than 63 million square miles, it spans from the Arctic Ocean in the north to the Southern Ocean in the south and separates Asia and Australia from the Americas. The Pacific Ocean is notable for its depth, featuring the Mariana Trench—the deepest point on Earth. It is home to diverse marine ecosystems, playing a crucial role in regulating the planet's climate and weather patterns. The ocean’s vastness also facilitates international trade and transportation and is culturally significant to many coastal communities worldwide.