Coral islands are landforms created from coral reefs, which are made up of tiny marine animals called coral polyps. These islands typically form in warm, shallow ocean waters, where the conditions are ideal for coral growth. Over time, the accumulation of coral debris and sand can lead to the formation of islands, often characterized by sandy beaches and lush vegetation. These islands are commonly found in tropical regions, such as the Caribbean Sea and the Great Barrier Reef in Australia. Coral islands play a crucial role in marine ecosystems, providing habitats for various species and protecting coastlines from erosion. They are also popular tourist destinations due to their natural beauty and biodiversity.