根据对青岛附近水域欧氏六线鱼（已达性成熟年龄）性腺周年宏观和组织学观察，性腺发育可分为：①重复发育Ⅱ期；②开始成熟期；③接近成熟期；④临产期或产卵期；⑤产后期。按性腺指数变化并结合性腺组织切片确定，欧氏六线鱼性腺发育在青岛海区一年一个周期，繁殖期在１０月下旬至１２月，繁殖盛期是１１月下旬至１２月中旬。 According to macroscopic and histological observation of the gonads of the fish (reached the sexual maturity age) near the waters near Qingdao, gonadal development can be divided into: ① repeated development Ⅱ; ② mature period; ③ close to maturity; ④ period of labor Or spawning period; ⑤ postpartum period. According to the changes of gonadal index and the determination of gonadal tissues, the gonadal development of O. occidentalis in Qingdao sea area is one cycle per year. The breeding period is from the end of October to December and the breeding peak is from the end of November to the middle of December.