Great barrier reefs are actually on top of the dead and old reefs and sea anemones. So the non living reefs are the foundations and support for the living reefs.
Great Barrier Reef
the great barrier reef
the Great Barrier Reef off the coast of Austrailia.
well, the great barrier reef is basically a giant coral reef.
The Great Barrier Reef
over 2,900 individual reefs and 900 islands
There are over 3000 individual reefs.
The Great Barrier Reef.
the great barrier reef the phuket sky dive
famous fringing coral reefs
Do you mean The Great Barrier Reef?