Watch full movie online. The piranha shares a notoriety with the shark and the wolf as one of nature's most relentless killers. It's very name has become synonymous with mindless consumption. The Piranha: Wolf in the Water explores the myth and mystique surrounding these exotic creatures while documenting the habits and behavior of the various species that comprise its widespread family. It's a world of cunning and savage justice acted out between predator and prey where the waters team with a menace that brings to mind vivid images of flashing teeth and shredded flesh.