The ocean that borders Asia and Australia is called the "Indian Ocean." It is the third-largest ocean in the world, covering about 20% of the Earth's water surface. The Indian Ocean is bounded by Africa to the west, Asia to the north, Australia to the east, and the Southern Ocean to the south. It is known for its warm waters and is an essential maritime route for global trade. The ocean supports diverse marine ecosystems, including coral reefs and rich biodiversity, which are crucial for fishing and tourism. It also plays a significant role in the Earth's climate and weather patterns.