Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Researchers have highlighted that the expansion of European settlement in Australia has urged a massive coral collapse at the Great Barrier Reef which occurred 50 years ago. They further mentioned that this fact could explain the massive deaths of natural branching corals which were subsequently replaced by a weedy type of coral. More and more research have exposed the fact that it was human themselves who have disturbed the equilibrium of the oceans along with the ecology of the Great Barrier Reef. In addition to this, climate change and reef tourism have contributed to cause further damage to the Great Barrier Reef and its species. In fact, biologists have mentioned that there was a very significant shift in the coral community composition that was associated with the colonization of Queensland, Australia...