Jiaozhou Wan is situated on the south side of the Shandong peninsula, between 12°5'30" to 124°4'24"E and 35°58'30" to 36°14'24" N. There are more than ten rivers entering bay and large quantities of organic matters are brought by them into the littoral zone.From the zoogeographic point of view, this region is a transi-tional zone between the Northern Temperate North Pacific zone and the Tropical Indo-Pacific Zone. The specific composition of the biocoenoses is very rich and complex, poc-essing important eco...