剑体似鱼形,卦图中藏阴阳鱼,因之命名,属八卦掌系小器械,亦名子午鸳鸯钺,弧形剑,弧形剑，鹿角刀.双鱼剑四尖九刃,小巧玲珑,短械长用,贵在轻、灵、活、变、转换变化，灵活迅捷，身法如电，运动如飞，身剑相合，以腰带动，进则一晃即至，退则一闪即逝，穿插盘绕，宛若龙蛇，纵横劈扫，疾似流星，练双鱼剑最催身法，攻防变化宜巧而快，其技法有：勾挂削抹、扎刺铲割、劈斩扫撩、云片推托，探插拥盖、架格缠锁、封闭拦截、领带穿拨等三十二字。

The double fishes sword has the shape like fish, bearing the Yin Yang Fish in the Bagua picture. So it is named double fishes sword. It belongs to the short weapon in Bagua fist movement. It is also called Ziwu mandarin duck sword, the arched sword and the antler sword. The double fishes sword has four shape tips and nine blades. It is small and exquisite. It is a short weapon that can be used as long one. It features at light, smart, flexible, changeable and switched. It is smart and swift. The body gestures are like lightning. It moves very fast. The body and sword integrate together, and it moves with the waist. When getting forwards, it moves and reaches the point at once. When withdrawing, it moves and gets away at once. Passing through, sticking into, and twining. It moves like dragon, split and sweep both vertically and horizontally. It is as fast as a shooting star. The double fishes movement practices the body gestures. The switch between attack and defence is better to be smart and fast. It has contained the following skills: hooking, hanging, cutting and wiping; pricking and shoveling; splitting, sweeping and stirring; cloud, pushing and holding; stretching, sticking and covering; resisting, twining and locking; blocking, leading and pulling, etc.