The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres (1,400 mi) over an area of approximately 344,400 square kilometres (133,000 sq mi).The reef is located in the Coral Sea, off the coast of Queensland, Australia.
The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres (1,400 mi) over an area of approximately 344,400 square kilometres (133,000 sq mi). The reef is located in the Coral Sea, off the coast of Queensland, Australia. The Great Barrier Reef can be seen from outer space and is the world's biggest single structure made by living organisms. This reef structure is composed of and built by billions of tiny organisms, known as coral polyps Image courtesy of the Great Barrier Reef Marine Park Authority. The Great Barrier Reef is the only living organic collective visible from Earth's orbit. The Great Barrier Reef, off the east coast of Australia, is one of the wonders of the natural world-it is the world's largest coral reef ecosystem. It was declared a World Heritage area in 1981 and added to the National Heritage List in 2007. The Great Barrier Reef system consists of more than 3000 reefs which range in size from 1 hectare to over 10,000 hectares in area. Dunk Island is one of more than 600 islands of the Great Barrier Reef. The Great Barrier Reef is a very special place! It is not one continuous reef, but made up of over 2900 reefs and 900 islands. It is the largest reef structure and marine park in the world.  A variety of colourful corals on Flynn Reef near Cairns. The Great Barrier Reef is a coral formation, the largest in the world, located off the Pacific coast of Queensland, Australia. It is home to a spectacular array of marine life and offers awesome diving opportunities.  The reef is scattered with beautiful islands and idyllic coral cays and covers more than 300,000 square kilometres. The Great Barrier Reef system consists of more than 3000 reefs which range in size from 1 hectare to over 10,000 hectares in area. Dunk Island is one of more than 600 islands of the Great Barrier Reef. The Great Barrier Reef has long been known to and used by the Aboriginal Australian and Torres Strait Islander peoples, and is an important part of local groups' cultures and spirituality. The reef is a very popular destination for tourists, especially in the Whitsunday Islands and Cairns regions. The reef is located in the Coral Sea, off the coast of Queensland, Australia. The Great Barrier Reef can be seen from outer space and is the world's biggest single structure made by living organisms. The Great Barrier Reef can only be described as breathtakingly beautiful and one of the wonders of the natural world. It is the largest collection of corals on Earth (over 400 types) making up thousands of individual reefs of all shapes and sizes, alongside hundreds of exotic islands. There is no doubt that the Great Barrier Reef is one of the world's richest areas of diversity; supporting a dazzling array of colourful corals, sponges, anemones and worms. Many species of tropical fish, birds, mammals and reptiles are also found here. Great Barrier Reef. The largest living structure, the Great Barrier Reef spans more than 1,200 miles (2,000 kilometers) of islands and submerged reefs. A plethora of coral thrives here, along with a sweep of parrotfish, surgeonfish, barracuda, and sharks.  The Great Barrier Reef Marine Park stretches approximately 2300 km along the coast of Queensland in north-eastern Australia – this is about the same length as the west coast of the USA from Vancouver to the Mexican border. The Great Barrier Reef is also unique as it extends over 14 degrees of latitude, from shallow estuarine areas to deep oceanic waters. Within this vast expanse are a unique range of ecological communities, habitats and species – all of which make the Reef one of the most complex natural ecosystems in the world. The Great Barrier Reef is the world's largest reef system, composed of roughly 3,000 individual reefs and 900 islands that stretch for 2,600 kilometres (1,616 mi) and cover an area of approximately 344,400 square kilometres (133,000 sq mi). The reef is located in the Coral Sea, off the coast of Queensland in northeast Australia. A large part of the reef is protected by the Great Barrier Reef Marine Park.
https://en.wikipedia.org/wiki/Great_Barrier_Reef http://www.australia.gov.au/about-australia/australian-story/great-barrier-reef http://www.greatadventures.com.au/great-barrier-reef-info.html http://wikitravel.org/en/Great_Barrier_Reef http://www.australia.gov.au/about-australia/australian-story/great-barrier-reef https://en.wikipedia.org/wiki/Great_Barrier_Reef http://www.bbc.co.uk/nature/places/Great_Barrier_Reef http://video.nationalgeographic.com/video/oceans-narrated-by-sylvia-earle/oceans-barrier-reef http://www.gbrmpa.gov.au/about-the-reef/facts-about-the-great-barrier-reef https://en.wikipedia.org/wiki/Environmental_threats_to_the_Great_Barrier_Reef
what is great barrier reef