The shallows give lemon sharks the chance to catch fish that would normally outrun them. Subscribe: bit.ly/BBCEarthSub Watch more videos from BBC Earth: Planet Earth bit.ly/PlanetEarthPlaylist Blue Planet bit.ly/BluePlanetPlaylist Planet Earth II bit.ly/PlanetEarthIIPlaylist Planet Dinosaur bit.ly/PlanetDinoPlaylist Great Barrier Reef Stretching a full 2000 kilometres in length and made up of 3000 individual reef systems and hundreds of islands, Australia's Great Barrier Reef is breathtakingly beautiful. Given world heritage status in 1981 it is one of the wonders of the natural world. This programme offers a definitive guide to the secrets of the reef - how it was created, how it works, the intricate relationships between its inhabitants and how climate change and other factors might shape its future. Welcome to BBC EARTH! The world is an amazing place full of stories, beauty and natural wonder. Here you'll find 50 years worth of astounding, entertaining, thought-provoking and educational natural history content. Dramatic, rare, and exclusive, nature doesn't get more exciting than this. Want to share your views with the team behind BBC Earth and win prizes? Join our fan panel here: tinyurl.com/YouTube-BBCEarth-FanPanel This is a channel from BBC Worldwide who help fund new BBC programmes Service information and feedback: bbcworldwide.com/vod-feedback--contact-details.aspx