牙鲆腹水病在牙鲆疾病中危害最为严重,该病从苗种到成鱼均有发生,死亡率可达50%-80%,而且尚无有效的治疗方法,因此,给养殖者造成巨大经济损失。该病病程长,流行面广,主要症状表现为腹部肿胀,各鳍基部、口部、鳃裂后部均有出血症状;鳃盖凹陷,鳃丝发白,呈贫血状,有的肛门微红。研究其发病原因,根据国内外研 Paralichthyday halophilic disease in the disease of flounder most harmful, the disease from seed to adult fish have occurred, the mortality rate of up to 50% -80%, but there is no effective treatment, therefore, to the farmer caused a huge Economic losses. The disease is long, popular, the main symptoms of abdominal swelling, the base of the fin, mouth, branchial cleft bleeding symptoms; gill depression, gill filaria, anemia, and some anal red . Study its causes, according to research at home and abroad