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Krill killers

Duration: 01:22

The Southern Ocean is extremely rich in food. Millions of penguins and seals and thousands of whales feed here. Most of them rely on krill for their food. Krill are small shrimp-like creatures about six centimetres long. In winter they are dispersed widely, mostly under the ice surface. But in summer they assemble in vast swarms, some of which may contain a billion individuals. They are the most numerous animals on earth and their combined weight far exceeds that of the total human population.

Available since: Wed 5 Oct 2011

This clip is from

Life In The Freezer The Bountiful Sea

1/6 Looks at how the abundant wildlife survives some of the hardest conditions on the planet.

First broadcast: 24 Jul 2007

Image for The Bountiful Sea Not currently available on BBC iPlayer

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