Electric fish
An 'Electric fish' is a fish that can make electric fields. Fishes that can generate such fields are said to be 'electrogenic', those that can detect them are called 'electroreceptive'. Most electrogenic fish are also electroreceptive. Many fish, for example sharks, rays, and catfishes are electroreceptive. They cannot generate electric fields though, and are therefore not classified as electric fish. Most bony fish are neither electrogenic nor electroreceptive.