"A mighty army of dolphins, sharks, whales, seals and gannets [they can change their whole body into these little daggers, says Birdchick] 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."YouTube's embiggened HD version is double-plus ossum, and this smaller version, also with HD, ain't bad.
Edited to add: OMG, watch the longer version over at Terrierman's blog. Too cool for words.