Free Online HD on Lookmovie. Sea Monster pals Tickles and Toothy McGru can't seem to fit in with the fish in the reef. In fact they can't even figure out what types of fish they are! Could it have to do with Halloween? With the help of Fifi and Lily the pals set off on a quest to learn their true identity. Get ready for an underwater Halloween adventure for the ages. It's Sea Monsters 3.