A Shoal of Sardines
In A Shoal of Sardines, narrator Sir David Attenborough details what happens when predators and prey come together in a feeding frenzy. Striped marlin, young tuna, and a sei whale all partake of the dense shoal of sardines. 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 resides there.
Lesson Express
Q: What does it mean that the open ocean is “sterile”?
A: It means there isn’t much there. Thousands of miles from land, the open ocean is like a desert — there aren’t many plants or animals.
Q: How are other animals notified of the shoal of sardines?
A: The noise, energy, and waves attract other animals, like the sei whale.
Q: What is the only evidence left of the feeding frenzy?
A: Scales from the sardines drift down to the ocean floor.
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