How Life in the Sea-Grass Bed Changes with the Tide
In How Life in the Sea-Grass Bed Changes with the Tide, narrator Sir David Attenborough investigates how life on the sea-grass bed changes as the tide comes in and goes out. Learn about the behavior of snails, hermit crabs, stingrays, and sharks during high and low tide. 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 are the nurse sharks and stingrays waiting for?
A: They’re waiting for the tide to return so that they can eat.
Q: What do the crabs do with the snail’s old shell?
A: The crabs use the shell for protection against predators.
Q: What do the sharks and rays use to find food?
A: The sharks and rays have highly developed electrical senses that help them find food.