I had that episode on tape. That diver really looked as if he was convulsing for a few seconds, then everyone onboard had to inspect him after the dive. I had a "pet" Torpedo Ray at Marineland for a few years. He hovered near me on more than thirty dives. He was like a puppy. Every time I swam over to his reef he alswys came over to greet me and would hang around for 3-20 minutes, just following me around. I never got zapped by it, but I never tried to touch it or show any signs of aggression toward it. A few years later some #@$**# idiot speared it and when he brought it up to the parking lot, had the nerve to ask me if it was edible.drbill:Definitely can get you whether you are wearing neoprene or not. When I was working with the Cousteaus on the Channel Islands special in their TBS "Rediscovery of the World" series (1985), one of the divers on the Alcyone was zapped by one. He knew what it was, but being young and daring he managed to get it to the point it discharged. After that he was through with diving for a while to ensure he had recovered.
Not sure on the voltage as I've heard a number of different ratings. It also differs in different species.