Cassius (17 feet 11 inches long)
Another huge saltwater croc makes its way on the list in the form of Cassius. The croc measures just an inch shy of 18 feet. In 2011, the animal held the record for the biggest captured crocodile, according to the Guinness Book of World Records. Visitors who want to get a look at the 110 year old could do so by going to Marineland Melanesia located in Green Island near Australia. The giant weighs in at 968 kgs.
