上川岛是广东省海水网箱养殖的一个重镇，由于网箱养殖所在的渔港水质污染逐年加重，而大多教养殖户鱼病防治知识不足，意识比较淡薄，近两年来鱼病流行加剧，尤其是1999年3－6月份，一向很少发病的红鳍奋鲷、花尾胡椒鲷、斜带领鲷等养殖鱼类，也深受病害的困扰，出现减收欠收 Shangchuan Island is a major center of seawater cage culture in Guangdong Province. Due to the increasing water pollution in the fishing port where the cage culture is conducted, most of them lack knowledge of prevention and treatment of fish diseases and their consciousness is relatively weak. In recent two years, the epidemic of fish diseases has become more and more serious From March to June 1999, farmed finfish such as redfin finfish, flower-tip pepper snapper and red-collar snapper, which have been rarely reported, are also plagued by diseases and appear to be underpaid