Coral reef A fringing reef forms around an extinct volcanic island as the island and ocean floor subsides. As the subsidence continues, the fringing reef becomes a barrier reef and ultimately an atoll reef. Darwin predicted that underneath each lagoon would be a bedrock base, the remains of the original volcano. Subsequent research supported this hypothesis. Darwin's theory followed from his understanding that coral polyps thrive in the tropics where the water is agitated, but can only live within a limited depth range, starting just below low tide. Where the level of the underlying earth allows, the corals grow around the coast
Miri-Sibuti Coral Reef National Park diving locations and the largest offshore national park created in the state of Sarawak. The reefs house a wide diversity of marine creatures including soft corals like leather corals, sea whips, Bubble corals, staghorn corals, Dendronephthya and Gorgonia sea fans, as well as sponges including elephant ear spongees. Fish species include clown fish, yellow and blueback fusiliers, angelfish, butterfly fish, sea perch, lizardfish, batfish, jackfish, barracudas, Napoleon wrasse and sharks. Other creatures include feather stars, giant clams, nudibranches, anemones and sea horses. Miri-Sibuti Coral Reef National Park The Miri-Sibuti Coral Reefs National Park is a protected area of coral reefs