What is the geographical term for a ring-shaped coral island
Island island of Surtsey, which was formed in 1963. An atoll is an island formed from a coral reef that has grown on an eroded and submerged volcanic island. The reef rises to the surface of the water and forms a new island. Atolls are typically ring-shaped with a central lagoon. Examples are the Line Islands in the Pacific and the Maldives in the Indian Ocean. Approximately 45,000 tropical islands with an area of at least exist. Examples formed from coral reefs include Maldives, Tonga, Samoa, Nauru, and Polynesia. Granite islands include Seychelles and Tioman and volcanic islands such as Saint
Coral Triangle biodiversity (more than 500 species), and the boundaries based on the area of greatest biodiversity for coral reef fishes. The 2013 documentary film "Journey to the South Pacific" tells the story of Coral Triangle conservation against the backdrop of island life. Coral Triangle The Coral Triangle is a geographical term so named as it refers to a roughly triangular area of the tropical marine waters of Indonesia, Malaysia, Papua New Guinea, Philippines, Solomon Islands and Timor-Leste that contain at least 500 species of reef-building corals in each ecoregion. This region encompasses portions of two biogeographic regions: the Indonesian-Philippines Region, and