Re: Shock in watts?
Yep, its a real shame that he didn't set up the experiment to include a storage scope so he could record the time element. Looking at some of the videos, it looks like the fish can sustain up to 2 seconds of pulses at an approximate 50% duty cycle although probably not a square wave. It does look though as if this little fish could possibly produce more energy than a 0.8J fence.
edit: Just found a video ( youtu.be/VGbj9Up4dvs ) showing one goading an alligator then killing it. Unfortunately for the fish, the gator dies with a death grip on its neck. The main thing is, it keeps shocking the gator continuously for just over 45 seconds, so several 10s of Joules involved.