Sharks have been a lightly debated myth in GTA IV. The reason sharks are unlikely to be in the game is because there are no sea creatures of any sort and the player can't swim underwater. However, there is a small but persistent group of myth hunters that insist that sharks have appeared in every GTA game since GTA Vice City. If the player takes a Higgins Heli Tour, the guide will sometimes mention that Liberty City's warm water attracts sharks to the city. A shark appears eating a barking dog on the program A History of Liberty - Part Two.