Résumé de l'épisode 6
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? Filmed from the surface, underwater and - for the first time - from the air, we reveal how giant the humpback whales can catch a tonne of fish every day.
Extrait de l'épisode 6 de Nature's Great Events, Season 1