Playlist: http://www.youtube.com/view_play_list?p=769661F6DEB6BA55 Find out more: http://www.bbc.co.uk/naturesgreatevents A mighty army of dolphins, sharks, whales, seals and gannets hunt down the billions of sardines along South Africa's east coast each winter. This is the sardine run: an underwater Armageddon, the greatest gathering of predators anywhere on the planet, and the most spectacular event in the world's oceans.