Nowadays the development of abyssal aquaculture cages is playing an increasingly important role in the sea farming industry in china but meanwhile , there are still some problems arising the sea farming industry in china focus on shoals and bays with good protection in which the water depth is small while the aquaculture density is large . these factors in addition to the pollution problems in the coastal gone have descended the quality of fishes , thus have had some negative effects on the economic benefits 目前我国海水网箱养殖业发展迅速，日渐成为渔业发展中的一个重要产业，在发展的同时，也暴露出一些问题：我国海水养殖主要在浅滩、掩护较好的海湾内，水深较浅，养殖密度大，加上近岸水域的污染，使鱼品质下降，经济效益受到一定影响。
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