Coral are marine animals living in compact colonies of many identical individuals called polyps. Over generations these polyps die off and create a large skeleton. Many corals needs sunlight to grow and typically live in shallow water in depths less than 200 feet. Coral are also typically the backbone of reefs in tropical and subtropical waters.
The reefs that coral create are often homes to over 4000 types of fish, mollusks, crabs, lobsters and many other animals. The underwater ecosystems are often popular tourist spots for snorkling or scuba diving. One of the most famous places is the Great Barrier Reef off Australia.
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