The+Great+Barrier+Reef+-+Tim+and+Lizzie

Hello,Tim and I are doing the Great Barrier Reef which is off the coast of Queensland! We have found out that there are at least 1,500 species of fish, 1,500 types of sponges, 5000 species of mollusc, 800 types of echidnoderms and 400 different species of coral polyps. We've also found that nearly 400 types of coral live in the Great Barrier Reef and that they have algae in them which they release when they are distressed. This is called bleaching and if bleeching occurs for a long time, the coral may die. Some corals in the Great Barrier Reef include brain coral, rose coral, sea fans, bubble coral, plate coral and table coral. The Great Barrier Reef is under serious threat because of global warming and the Crown of Thorns Seastar. An adult Crown of Thorns Seastar can kill a whole reef.

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