鱼类的生殖腺同其他动物一样有雌雄两种,雄的叫精巢,雌的叫卵巢,产生两种不同的性细胞。绝大部分的鱼是雌雄异体,体外受精的。鱼的生殖器官一般是长形成对的。卵巢大多是淡红或黄色。在生殖季节,卵巢膨大,卵粒清晰可见。成熟的卵,在适 Fish gonads are the same as other animals, both male and female, male called the testis, the female calls the ovary, resulting in two different sex cells. Most fish are dioecious and in vitro fertilized. The genital organs of fish are usually long-formed pairs. Ovaries are mostly pink or yellow. In the reproductive season, ovarian enlargement, eggs clearly visible. Mature eggs, suitable