The idea of a fish being able to generate electricity strong enough to light lamp bulbs-or even to run a small electric motor-is almost unbelievable, but several kinds of fish are able to do this. Even more strangely, this curious power has been acquired in different ways by fish belonging to very different families. The idea of ​​a fish being able to generate electricity strong enough to light lamp bulbs-or even to run a small electric motor-is almost unbelievable, but several kinds of fish are able to do this. Even more strangely, this curious power has been acquired in different ways by fish belonging to very different families.