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
St. Crispin's Reef St. Crispin's Reef St. Crispin's Reef is an elongate outer-shelf coral reef in the Great Barrier Reef, Queensland, Australia. Named after St. Crispin, the French patron saint of cobblers and tanners, St. Crispin's Reef is located 35 miles off the Queensland coast in the Coral Sea, in latitude 16° 07' 54.14" S longitude 145° 48' 22.46" E, at a depth of 9 metres. It lies east of Undine Reef and south of Agincourt Reefs, close to Opal Reef. Protected by neighbor reefs, St. Crispin's structure consists of many shallow sandy channels that reticulate around coral mounds, rather than a typical