Zhejiang province is located in the southeast coastal areas of China, with the total coastline about 6,321 km in length. There are four bays, i.e. Hangzhou bay, Xiangshan harbour, Sanmen bay and Yueqing bay, and 3,016 islands in this area. The region also includes Zhoushan fishing ground, which is the largest one in China and an internationally important fishing ground that contains many actual and potential maricultural sites. In recent twenty years, with the rapid economic development of Changjia...