Longzai Island is located in the sea area 10 nautical miles off the Yalong Bay in Sanya City, Hainan Province. It is a primitive island hidden in a bustling tourist area. The island is surrounded by mountains, the sea water is clear and transparent, the lateral visibility can reach 18-30 meters, and the water quality is very good. There are rich species of corals, which are well protected and colorful, mostly soft corals. There are abundant marine fish on the seabed, including funny and cute clownfish, elegant angelfish, and colorful butterfly fish. Sometimes you can also encounter spectacular fish storms. It is the best choice for leisure diving and underwater photography, and it is also a diving spot with better diving experience in China.