Stages of development in coral reefs. Cross-sectional view (above) and map view/aerial photographs (below) of (a) a fringing reef, (b) a barrier reef, and (c) an atoll. With the right conditions for coral growth and enough time, a coral reef progresses from fringing reef to barrier reef to atoll. 태평양에서 볼 수 있는 산호섬의 여러 유형들
