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How do coral reefs form?
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A coral is a small animal that lives all its life in one place. It thrives in warm, shallow seawater. The coral builds a shell, which it cements onto the dead shells of other corals, and so a great mass of rocky shell material is built up. If the sea bed sinks, the corals continue to grow upward, forming a reef. Many sinking islands in the Pacific Ocean have disappeared, leaving only a coral reef behind. | | Australia's Great Barrier Reef is the largest coral reef in the World. |
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Previous:
Back
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Book:
1001
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Section:
Earth
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Chapter:
Sea
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