"Anything that can sink is worth sinking."
The terror of the deep. If he's not stealing sunken
treasure or ancient artifacts, he amuses himself by smashing holes
in submarines and cruise ships. Electrically-charged, razor-tipped
harpoon gun momentarily short-circuits on contact. Also armed with
vice-like tentacles that stick to any surface. So strong underwater
that he can wrestle a whale to a standstill. Inner robot convers
to metal-rending crab creature equipped with depth gauges, deep-sea
radar and acetylene torch gun.