The ocean that borders the eastern coast of Austrailia is the Coral Sea. This sea is part of the South Pacific Ocean and is well-known for its abundant marine life and diverse ecosystems. It plays a critical role in Australia’s tourism, particularly around the Great Barrier Reef, which is a UNESCO World Heritage site. The Coral Sea's warm, clear waters are not only vital for tourism and fishing but also provide significant habitats for numerous species, contributing to marine biodiversity.