Nature's Epic Journeys

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Nature's Great Events: Episode 6: The Great Feast

Documentaries

The Great Feast

Episode 6

Episode 6: The Great Feast

Nature's Great Events

BBC One - Nature's Great Events, The Great Feast

Whales and sea lions alike journey to the seas off Alaska to feed on the plankton bloom.

Documentary series. The cameras follow whales and sea lions alike as they journey to the seas off Alaska to feed on plankton bloom.

Every summer in the seas off Alaska humpback whales, sea lions and killer whales depend on an explosion of plant life - the plankton bloom. It transforms these seas into the richest on earth. But will these animals survive to enjoy the great feast?

The summer sun sparks the growth of phytoplankton, microscopic floating plants which can bloom in such vast numbers that they eclipse even the Amazon rainforest in sheer abundance of plant life. Remarkably, it is these minute plants that are the basis of all life here.

But both whales and sea lions have obstacles to overcome before they can enjoy the feast. Humpback whales migrate 3,000 miles from Hawaii, and during their three-month voyage, lose a third of their body weight. In a heartrending scene, a mother sea lion loses her pup in a violent summer storm, while another dramatic sequence shows a group of killer whales working together to kill a huge male sea lion.

In late summer, the plankton bloom is at its height. Vast shoals of herring gather to feed on it, diving birds round the fish up into a bait ball and then a humpback whale roars in to scoop up the entire ball of herring in one huge mouthful.

When a dozen whales work together, they employ the ultimate method of co-operative fishing - bubble net feeding. One whale blows a ring of bubbles to engulf the fish and then they charge in as one. Filmed from the surface, underwater and, for the first time, from the air, we reveal how these giant hunters can catch a tonne of fish every day.

In Swallowed By a Whale, cameramen Shane Moore and David Reichert were filming bait balls when a 30-tonne whale roared past, within feet of them, swallowing the entire bait ball.

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Factual: Science & Nature

Documentary series looking at the most dramatic wildlife spectacles on our planet.

Documentary series looking at the most dramatic wildlife spectacles on our planet, showing how life responds to natural events which can dramatically transform entire landscapes.

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