在江河湖海中,有一些身上带有“发电机”的鱼。这些鱼利用自身的电来识别方向,猎取食物,打击敌人。电鳗生活在南美洲的亚马逊河和俄俐诺科河流域。它身长大约2米,重达20多公斤。它身体两侧的肌肉由8000多个肌肉薄片重叠排列而成,每个肌肉薄片就像一节“小电池”,能放出300伏￣5 In rivers and lakes, there are some fish with “generators” on them. These fish use their own electricity to identify directions, hunt for food, and strike the enemy. Electric eels live in South America, the Amazon and the Russian Poly River basin. It is about 2 meters long and weighs over 20 kilos. Its body muscles on both sides of the body by more than 8000 muscle sheets arranged in superposition, each muscle sheet is like a “small battery”, can release 300 V ~ 5