鱼类是低等脊椎动物 ,其遗传控制作用很原始 ,在外界条件作用下性别容易发生变化。利用性激素就能诱导鱼的性别向人们希望的方向发展。性激素分两种 ,睾丸分泌的为雄性激素 ,卵巢分泌的为雌性激素。鱼类的原始生殖上皮组织是具有决定向雌性发育和向雄性发育的髓质部两个组成部 Fish are lower vertebrates and their genetic control is very primitive and their gender is susceptible to changes under external conditions. The use of sex hormones can induce the fish’s sex to the direction that people want. Sex hormones in two, testicular secretion of male hormones, ovarian secretion of estrogen. Primordial genital epithelial tissue of fish is the two components of the medulla that determine the development to the female and the male