有的鱼为了生存，用放电的方法摄食或御敌。迄今世界上发现三种能发电的鱼：一种是电鲶，产于非洲河里，能发出高达350伏的电压；另一种是电鳗，产于美洲海洋中，其放电瞬间电压可高达886伏；再有一种是电鳐，产于大西洋．其发电电压只有50～80伏．但电流可至50安培，如取电压6 Some fish in order to survive, use the discharge method or resist the enemy. To date, three types of fish that generate electricity have been discovered in the world: one is catfish, which is produced in the African river and emits voltages as high as 350 volts; the other is eel, produced in the oceans of the Americas and has an instantaneous discharge voltage of up to 886 volts; there is another kind of electricity 鳐 produced in the Atlantic Ocean. The power voltage is only 50 ~ 80 volts. But the current up to 50 amps, such as voltage 6