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Extreme Coral Reef!

Extreme Coral Reef!

by Melissa Stewart

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Some coral is extremely hard—with a skeleton made of stone.

Some coral is extremely soft—so soft, it sways in the ocean current.

Most coral animals are extremely small—the size of a pencil eraser.

But some coral reefs are extremely large—bigger than New Mexico!

Tiny coral animals can build huge reefs, and

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