Sea. According to the dictionary geographic network, Shiziyang is a sea area in the South China Sea of China, which lies between the southeast of Hainan Island, the south of Guangdong Province and the southwest of Guangxi Zhuang Autonomous Region. Its east and south are connected with the South China Sea and the Pacific Ocean respectively, and its west and north are adjacent to the coastlines of Guangdong and Guangxi Zhuang Autonomous Region. The lion ocean covers an area of about 6.5438+0.3 million square kilometers, with an average water depth of about 400 meters and the deepest point of 654.38+0.200 meters. The water temperature in this sea area is relatively high, which keeps above 20℃ all the year round. It is also an important fishing ground and shipping channel in the South China Sea.