BBC One's brilliant new nature series with David Attenborough, exploring the incredible continent of AFRICA. +
The Great Barrier Reef
'Where is it? In the Coral Sea, off the Queensland coast in northeast Australia, and reaching north almost to Papua New Guinea. But with over 2,900 individual reefs, 900 islands, an area of 133,000 square miles, and stretching for 1,600 miles, it can hardly be said to be in one place.
Did you know? The reef can be seen from space is and is the world’s largest single structure made from living organisms. It is thought a reef originated here 600,000 years ago (some say 18 million years ago), but the present reef (which grew on older reefs) probably dates back around 20,000 years. It supports, among other things, 1,500 species of fish, 400 corals, 4,000 types of mollusc, 1,500 different sponges, 200 bird species and 500 varieties of seaweed.’