My shark came home!
After knawing through it's cable lock one night while evacuating this very unit a strange thing happened. I guess my shark decided it needed a vacation. I assume it was an around the world swim because it took him over a year to return. Looks like a giant squid chewed off his ballast knob and he picked up a pretty bungie tie in Madagascar for his cord.
Looks like he was to tired to go all the way home. He was actually working on the other circuit of this unit when he went missing. I guess he got a guilty conscience and decided to "return".