Coral reefs are among nature's most spectacular and beautiful creations.
They are home to a dazzling array of marine life - nearly a million species. Up to 3000 species may co-exist on a single reef and the density of fishes is 100 times greater than the ocean average. Many reefs dwarf our most architecturally ambitious structures, tens of metres high and up to 2000km long. Coral reefs are found in over 100 countries of the tropical seas. For thousands of years coastal communities have relied on reefs for a host of products.