报道了寄生于海水养殖鱼类体表的新本尼登虫 (Neobenedeniagirellae)生活史各期的发育过程。虫卵在 2 5℃～ 2 8℃海水温度条件下 4～ 6d钩毛蚴发育成熟 ;用钩毛蚴人工感染一种鲻科鱼类———棱 (Lizacarinatus)获得成功。在 2 6℃～ 30℃实验室温度条件下 ,钩毛蚴感染棱 10～ 14d后虫体发育成熟 ,并在感染后的第 16天虫体开始产卵。本文对新本尼登虫的生活史发育各期幼虫的形态进行详细的观察、描述、测量和绘图 The developmental stages of the life cycle of Neobenedenia girellae, parasitic on the maricultured marine fish, were reported. The eggs developed mature 4 ~ 6d at 25 ℃ ~ 28 ℃ seawater temperature. Artificial infection with a zygote, Lizacarinatus, was successful with the hook-worm. Under the laboratory temperature of 26 ℃ ~ 30 ℃, the larvae became mature after 10 ~ 14 days of infection with M. cercariae and began to lay eggs on the 16th day after infection. In this paper, the morphological changes of larvae of each stage of the life cycle of Neptune were observed, described, measured and plotted