The Great Barrier Reef can be seen from outer space and is the world’s biggest single structure made by living organisms.[6] This reef structure is composed of and built by billions of tiny organisms, known as coral polyps.[7] It supports a wide diversity of life and was selected as a World Heritage Site in 1981.[1][2] CNN labeled it one of the seven natural wonders of the world.[8] The Queensland National Trust named it a state icon of Queensland.[9]

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