I had one about 22 inches and it hit my hands and shocked me and it sent me right to the floor the shock is real not BS believe me and as far as active goes mine was active all day long even lights on he never stopped moving so I guess it depends on fish just be careful and take great care when around him I've seen videos of them shocking people and sending them right over the side of the boat or right to the ground like I did and just FYI as they grow the shock grows with them