Brutus (18 feet 4 inches long)
Breaking the 18 foot barrier, Brutus occupies the fourth spot on this list at 18 feet and 4 inches. Aside from his size, there is one other feature that captivates people to it. It only has three extremities. It once called the Adelaide River its home. Mystery still surrounds the reason how it lost one of its legs. The most popular theory of all was that he lost it during a violent battle against a bull shark.
