![Jurassic Shark 2: Aquapocalypse picture](/images/titles/14000-14999/14751_sm.jpg)
Trivia: "Megalodon" means "large tooth." Without a complete fossil/skeleton, scientists used the size of teeth to estimate the shark's actual length/size (which may not be accurate) and concluded it was the largest shark known to have existed. At an estimated 15-18 meters, the Megalodon was about three times the length of a Great White shark.