Corals make up the reefs and cays and are responsible for a huge variety of sea life in the reef — green turtles, several varieties of whales and dolphins, the dugong, about 4000 types of mollusks, 1500 different species of fish, as well as beautifully colored bird life encompassing at least 200 species. The Great Reef Marine Park is a huge tourist attraction with millions of tourists visiting the area each year.
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