What are coral island made from?

Coral islands are made from the skeletons of tiny marine animals called coral polyps. Coral polyps are related to jellyfish and sea anemones. They live in colonies and secrete a hard exoskeleton made of calcium carbonate. When a coral polyp dies, its skeleton remains behind and becomes part of the coral reef. Over time, the coral reef grows and eventually becomes an island.

Coral islands are found in tropical and subtropical waters around the world. They are most common in the Pacific and Indian Oceans. Some of the most famous coral islands include the Maldives, the Bahamas, and the Great Barrier Reef.

Coral islands are important ecosystems. They provide habitat for a wide variety of marine life, including fish, mollusks, and crustaceans. Coral reefs also help to protect coastlines from erosion and storm damage.