An Army of Spider Crabs
In An Army of Spider Crabs, narrator Sir David Attenborough shows the fascinating journey taken by spider crabs as their giant tribes grow and move through the green seas in Australia. From the hardening of their outer shells to moving in masses, these crabs go through quite the journey. This video is excerpted from BBC’s Blue Planet II, a natural history series that explores the world's oceans, the animals that live in them, and the threats they face, using modern filming techniques and equipment to capture previously unseen areas of the ocean.
Lesson Express
Q: Why is there safety in numbers for spider crabs?
A: It’s a defense mechanism against predators.
Q: Why are they called spider crabs?
A: Their long, spindly legs look like the legs of a spider.
Q: What do spider crabs hatch from?
A: They hatch from a soft-shelled egg.
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In Sally Lightfoot Crabs Run the Gauntlet, narrator Sir David Attenborough introduces these colorful crabs who jump from rock to rock as the tide goes out to make it to their feeding ground. The crabs are very determined, but so are some fierce predators along the way. This video is excerpted from BBC’s Blue Planet II, a natural history series that explores the world's oceans, the animals that live in them, and the threats they face, using modern filming techniques and equipment to capture previously unseen areas of the ocean.
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.
In Predators and Defenders of the Coral Reef, narrator Sir David Attenborough examines what happens when predators descend on the coral reef. Learn how a crab protects the reef. Learn how parrotfish’s actions add up to creating beaches and islands. 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.
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