By observing the movement of G.niloticus, this paper analyses the structure and propulsive mechanism of the undulatory dorsal fin, and then gives a simplified kinematic model of it.

• 通过建立“尼罗河魔鬼”鱼的游动观测系统，对样本进行仿生运动学实验观测，分析了柔性长背鳍的结构和波动推进原理；