Orcas and Herring in the North Atlantic
In Orcas and Herring in the North Atlantic, narrator Sir David Attenborough describes how orca catch herring off the coast of Norway. Watch how orca manage to catch herring that are swimming in a huge school. This video is excerpted from BBC’s Blue Planet, a definitive documentary series diving into the mysterious depths of the sea to discover the natural history of the world’s oceans and the rarely seen marine life that reside there.
Lesson Express
Q: What do the herring eat in the winter?
A: The herring live only on the fat they accumulated during the summer plankton feast.
Q: What strategy do the orcas use to hunt the herring?
A: The orcas swim below the herring, driving them upwards. Then they use their tails to stun the herring with water pressure.
Q: Why are the winter storms useful?
A: The storms are important because they stir up the rich nutrients at the bottom of the ocean.
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