Device for use with electrofishing, comprising an electrode (2) that has been made of an electrical conductor (3) that has been partially covered with an insulator (4), wherein the electrical conductor (3) distributed along its length is at at least one position free of insulator (4). Furthermore the invention relates to a module (1) for application in such a device, to the application of such a module and to a method for electrofishing. The device is characterized in that the device is formed of an assembly of separate modules (1) in which each module is provided with: - an electrical connection for providing electrical power supply to the module； - a pulse generator (6) connected to the electrical connection for powering the electrode in a pulsating way； and - at least one connection means (5) for mutual coupling of modules.
