How are coral reefs formed?

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Coral Reefs - Oceans, Coasts & Seashores (U.S. National Park Service)

What Is Coral & Why Is It Important? IFAW

Blue Planet II episode 3 - how are coral reefs formed by polyps and what are clownfish, broadclub cuttlefish, and green turtles?

coral reef - Students, Britannica Kids

What is coral, and why are coral reefs important?

What is a coral reef made of?

Video: How Do Corals Build Reefs?

Coral Reef for Kids Science for Kids

CORAL REEFS BY JOSIE KENT WHAT ARE CORAL REEFS? Coral reefs are rocky mounds and/or ridges formed in the sea by living things through the collection. - ppt download