Sorry guys. Scaled fish don't shock, scales are insulators. Now catfish, eels and skin varmints will die. In my profession we had what was called "breakdown" sets. This was a metal box that held 14 45v drycell batteries that produced 630v at 5 amps. I know of two guys that hooked two of them together to make 1260v and 10 amps clipped to 2 pieces of hardware cloth. At Horizon Park just north of Tampa stadium there are some ponds. Threw the hw cloth in the pond 10-15 feet apart. When you hit the switch fish went crazy. Don't remember seeing any skinned fish but the bream were only stunned for a short while. Harold the paralyzed gentleman that lives near your place at Kiss. was the other one.