Johnson South Reef Johnson South Reef Johnson South Reef (; ), also known as Chigua Reef in China, Gạc Ma Reef in Vietnam and Mabini Reef in the Philippines is a reef in the southwest portion of the Union Banks in the Spratly Islands of the South China Sea. It is controlled by the People's Republic of China (PRC), but its ownership is disputed by the PRC, the Philippines, Taiwan, and Vietnam. Johnson South Reef lies adjacent to the Vietnamese-controlled Collins Reef (also known as Johnson North Reef) which lies to the northwest. It is naturally above water only at low tide. Prior
Davis Reef Davis Reef Davis Reef is a coral reef located within the Florida Keys National Marine Sanctuary. It lies to the southeast of Plantation Key. This reef lies within a Sanctuary Preservation Area (SPA). The southern end of the reef is sometimes called "Davis Ledge." Davis reef lies between Crocker Reef and Conch Reef. The Fish and Wildlife Research Institute (FWRI, the research arm of the Florida Fish and Wildlife Conservation Commission), the Florida Keys National Marine Sanctuary, the Coral Restoration Foundation (CRF), the Wildlife Foundation of Florida (WFF), and the family of the late Charlie Stroh have recently begun a