The Great Barrier Reef off the coast of Australia is the largest coral reef in the world. It spans 1,400 miles and is home to 400 types of coral, 1,500 species of fish and 4,000 types of mollusk ...

The reef's sheer diversity is part of what makes it great. It hosts 5,000 types of mollusks, 1,800 species of fish, 125 kinds of sharks, and innumerable miniature organisms. But the most riveting ...

Together with coralline algae and other groups that produce limestone skeletons, corals gradually build up the complex three-dimensional structure of a reef. This habitable architecture is more than ...

Filmed over the course of a year, this three-part documentary follows those who live in one of the most extraordinary places on the planet, Australia's Great Barrier Reef. ABC iview Home Watch all ...