Coral reef islands and atolls. The reef face is the zone above the reef floor or the reef drop-off. This zone is often the reef's most diverse area. Coral and calcareous algae provide complex habitats and areas that offer protection, such as cracks and crevices. Invertebrates and epiphytic algae provide much of the food for other organisms. A common feature on this forereef zone is spur and groove formations that serve to transport sediment downslope. The reef flat is the sandy-bottomed flat, which can be behind the main reef, containing chunks of coral. This zone may border a lagoon and serve as
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