The largest collection of coral reefs can be found in the Great Barrier Reef in Australia. Home to over 400 coral types, 1,500 fish species, and 4,000 mollusk types, the Great Barrier Reef is an extensive coral reef ecosystem that warrants protection and safety. It is hailed as a World Heritage Site in 1981. Unfortunately, it’s now in the brink of extinction. Species like sea cow and the large green turtle are currently endangered. Environmental groups and advocates are working double time to stop this from happening. We can also do our share by promoting awareness about the Great Barrier Reef, and by practicing responsible tourism wherever we travel.