The Echinoderms of the Deep Seafloor
In The Echinoderms of the Deep Seafloor, narrator Sir David Attenborough explores two echinoderms that live on the seafloor. Learn about a sea lily that lives on a ledge. 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: Why does the narrator compare the echinoderms to a vacuum?
A: They live on the seafloor and vacuum up any edible particles.
Q: What is significant about the echinoderms?
A: They are one of the most numerous animals on the planet because the ocean is so vast and full of them.
Q: Why do animals like the sea lily live on the ridge?
A: It’s a good spot for them to anchor and catch passing food.
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