What are the names of the coral islands?

Coral islands, often referred to as atolls, are typically formed from coral reef structures. Notable examples include the Maldives in the Indian ocean, the Great Barrier Reef islands in Australia, and the Tuamotu Archipelago in French Polynesia. Additionally, islands like Bikini Atoll and Majuro Atoll in the Marshall Islands are famous coral islands known for their unique ecosystems.