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Did you know that the hard structures in coral reefs are made of the skeletons of small animals called coral polyps? Algae give tropical corals their bright colors. Discover more intriguing facts in Coral Reefs, an Exploring Ecosystems book.
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Did you know that the hard structures in coral reefs are made of the skeletons of small animals called coral polyps? Algae give tropical corals their bright colors. Discover more intriguing facts in Coral Reefs, an Exploring Ecosystems book.