HD: Underwater Armageddon - Nature's Great Events: The Great Tide - BBC One

Playlist: www.youtube.com Find out more: www.bbc.co.uk 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.

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