National Geographic Live: Dr. Erika Woolsey: Diving The Great Barrier Reef

Once a year, Australia’s most famous reef turns into a snow globe as millions of coral polyps reproduce to send the next generation afloat. This incredible display disguises a harsh truth: the Great Barrier Reef is under attack. More than half of the coral here has died, with climate change bleaching many parts of this vast landscape. But don’t give up hope! There is still plenty to see and plenty to save. With marine biologist Dr. Erika Woolsey, meet some of the most bizarre, colorful species that live in these underwater jungles.