Thanks. So do the fish all just float up to the surface, and float there until the shock wears off (and then go about their business)?
The electrofishing boat operator sure wishes they would.....it ain't that easy most of the time, depending on water quality, type of fishing rig, size and type of fish, etc., the fish may only dart about and be impossible to catch or sometimes roll over deader'n a mackeral in the desert and everything inbetween.
Generally speaking, with a pretty good pulsating shocker, and middling water chemistry, many fish will roll over stunned long enough to gather them up and put them into a live well for weighing and measuring, then releasing in good shape, later.
It is still fishing and not catching, just with better odds. You still have to find the fish to catch them but you don't have to make them bite.
The better rigs are very powerful, driven by large generators and have the ability to change many settings to adjust for different water conditions and to target various different species.
A very long time ago in a different world (behind the Pine Curtain) I built and operated the very first LEGAL, privately owned electrofishing boat in the state. I was given the condition that the boat would always remain locked up on the farm, and if off the farm would never be left unattended out of my sight. Not so strict nowadays. But I'd not wanna get caught with the rig in public waters without a permit...