The Great Barrier Reef is classified as a natural feature known as a coral reef system. Located off the northeastern coast of Australia, it is the largest coral reef system in the world, comprising over 2,900 individual reefs and 900 islands. Spanning approximately 344,400 square kilometers, it is home to an incredible diversity of marine life, including thousands of species of fish, corals, mollusks, and other animals. The reef plays a crucial role in the local ecosystem, supports tourism, and is recognized as a UNESCO World Heritage Site for its ecological significance.