Megaladon # 4
Shark Week ententhusiasts clamor at the thought of the prehistoric behemoth still existing today. This massive shark had the strongest bite of any animal that ever lived and grew to lengths of more than 50 feet long. The ocean is a bit place, and many feel there is a chance that these monsters could still be roaming the waters today. The Discovery Channel even aired a convincing mockumentary last year that upset many shark lovers. Scientists think it is unlikely, but it is possible megalodon could still be real today.