<P> 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 . </P>
<P> 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 . </P>
what is the length of the great barrier reef
what is the length of the great barrier reef
2,300 kilometres ( 1,400 mi )
2,300 kilometres ( 1,400 mi )