It only appears in Aqua Grabber Level 1 (Clam Waters) as the keeper of the Grand Pearl, a valuable object that is needed to pass that level. If the player grabs the Grand Pearl, The Giant Clam would suck the player's penguin in, then sneeze the player's penguin out to the possible destruction of the Aqua Grabber if their submarine ran out of air. The only way to steal its pearl is to drop a "pearl-shaped rock" into its mouth, and then steal the Grand Pearl. Its name is 'Big Bertha'.
- The giant clam seems to be allergic to either penguins, poultry, birds, metal, fuel, or oil. Its true allergy is unknown; all that is known is that it sneezes penguins out with little air left in the sub.
- The giant clam can create an unlimited amount of grand pearls.