The effects of ultrasound on the hatching of the goldfish(Carassiusauratus auratus)and loach(Paramisgurnus dabryanus(sauvage))cytulas werestudied.The ultrasound with certain frequencies can accelerate the developmentof cytulas,induce the embryos to break membrane earlier,increase the survivalrate of larvas,and increase 50% hatching rate of loach cytulas at lower temper-ature. The effects of ultrasound on the hatching of the goldfish (Carassius auratus auratus) and loach (Paramisgurnus dabryanus (sauvage)) cytulas were staged. The ultrasound with certain frequencies can accelerate the development of cytulas, induce the embryos to break membrane earlier, increase the survival rate of larvas , and increase 50% hatching rate of loach cytulas at lower temper-ature.