Dimension Films has released this new poster for Alexandre Aja's Piranha 3D , opening in theaters on August 20th. The horror thriller stars Jessica Szohr, Steven R. McQueen, Elisabeth Shue, Jerry O'Connell, Ving Rhames, Richard Dreyfuss and Christopher Lloyd. The movie is described as follows: Every year the population of sleepy Lake Victoria explodes from 5,000 to 50,000 for Spring Break; a riot of sun and drunken fun. But this year, ...