“Planet Of The Sharks” (*1/2 out of four) was a toothless shark sci/fi fizzle set in the near future in which glacial melting has overtaken Earth and sharks now dominate the planet and operate as a massive school led by a mutated alpha shark. So crummy and low-rent it makes any of the awful “Jaws” sequels look like Hitchcock by comparison. Many of the sharks are better actors than the humans. Watch “Planet Of The Apes” instead.