Summary:
- Coral reefs are underwater ecosystems made up of tiny animals called coral polyps. These polyps live in colonies and secrete hard shells that form the coral reef structure.
- Coral reefs are found in shallow, warm ocean waters and are home to a diverse array of marine life, including fish, crustaceans, and mollusks.
- Coral reefs are important for their ecological, economic, and cultural value, but they are under threat from climate change, pollution, and other human activities that can damage or destroy these fragile ecosystems.