Atoll

An atoll is a circular or oval-shaped coral reef enclosing a central lagoon. These unique island formations are found in tropical and subtropical waters, where warm temperatures support coral growth. Atolls typically feature a ring of low-lying land or coral islands surrounding a shallow lagoon. The vast majority of the world's estimated 440 atolls are located in the Pacific Ocean, with fewer found in the Indian Ocean and Caribbean Sea. These remarkable structures play crucial roles in marine ecosystems and are often home to diverse plant and animal species.