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
Réunion's coral reef and paragliding. Many diving schools suggest training sessions and first dives at reef sites. Local businesses, organizations, and government localities organize photography contests and other events to boost tourism around the reef. In a recent study, specialists estimated the benefits of leisure activities such as scuba diving to be above €2,076,150, water sports above €118,018, and diving boats and submarines above €1,851,614. The coral reef influences the price of local housing; homes close to a beach protected by corals enjoy lower real estate prices. Réunion's coral reef Réunion is an island located near the eastern coast of Madagascar in the