Wikipedia
An electric fish is any fish that can generate electric fields. A fish that can generate electric fields is said to be electrogenic while a fish that has the ability to detect electric fields is said to be electroreceptive. Most electrogenic fish are also electroreceptive. Electric fish species can be found both in the ocean and in freshwater rivers of South America ( Gymnotiformes) and Africa ( Mormyridae). Many fish such as sharks, rays and catfishes can detect electric fields and are thus electroreceptive, but they are not classified as electric fish because they cannot generate electricity. Most common bony fish ( teleosts), including most fish kept in aquaria or caught for food, are neither electrogenic nor electroreceptive.
Electric fish produce their electrical fields from a specialized structure called an electric organ. This is made up of modified muscle or nerve cells, which became specialized for producing bioelectric fields stronger than those that normal nerves or muscles produce. Typically this organ is located in the tail of the electric fish. The electrical output of the organ is called the electric organ discharge (EOD).
Usage examples of "electric fish".
Fascinatingly, the South American electric fish have hit upon almost exactly the same solution as the African ones, but not quite.
We gave them the scent of orchids, the talents of electric fish, the ability to regenerate lost appendages the way lizards regrow tails.
It is not even certain that you are moving at all, the flows of chilliness against your face may be the deep-sea currents, and your car, like some sluggish electric fish, may be sitting steadily upon the bottom of the Sea, staring in front of her with the glaring eyes of her lamps, and letting the submarine life pass by her.