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The Great Barrier Reef is located in the Coral Sea, off the coast of Queensland, in the continent of Australia. It is the World's Natural Wonder, the largest and longest coral reef system. The coral reef consists of 2,900 individual reefs and about 900 islands. The Great Barrier reef is unique and has a diverse range of marine ecological habitats.  The Barrier Reef is considered to be special as it forms the most complex natural ecosystems in the world. There are about 400 types of coral, 4,000 types of molluscs and 1,500 species of fish.  The Great Barrier reef is the biggest single structure that is made by billions of living organisms. It was declared as a World Heritage Site in 1981.                                                        Cod Townsville-Great  Barrier Reef The Great Barrier Reef is an incredible natural habitat for thousands of marine life. It is labelled as one of the seven natural wonders of the world and it can be seen from outer space. The spectacular coral