The Giant Water Beetle was one of the monsters that was forced to fight in the Monster Arena. The Giant Water beetle had the ability to swim at considerably fast speeds and emit a toxic tear gas from the openings situated near its eyes.
A massive insect, the Giant Water Beetle’s origins remain unknown. Either a mutant like all the rest or made by his master Maximillian Spiel. The insect was set out to attack the H.E.A.T. headquarters as Spiel’s people kidnapped Zilla. Breaking through the building and spewing his tear gas, the monster almost killed the group before being called back when Zilla was captured.
During the brawl between Zilla and the Rhinosaurus, the Giant Water Beetle was also sent in to attack Zilla. H.E.A.T., also stuck in the ring, tried to help Zilla tip the scales by using splintered pieces of the rhino monster’s horn as spears and attacked the beetle. When Craven fired his own laser at Spiel’s and ended his attack on Zilla, the famous monster launched the insect into the greedy man’s control room, pinning him under the unconscious insect.