- Megalodon (Big tooth) a huge shark of the Early Miocene to the Pliocene that grew to 18 m in length. It possessed over 250 serrated teeth of four different kinds arranged in five rows in its mouth and inhabited waters in Europe, Africa, the Americas, and Australia. It most commonly occurred in subtropical to temperate latitudes. Found in many marine environments from shallow coastal waters to deep off shore seas. It is thought to have been one of the largest and most powerful carnivores to have ever lived. Its teeth could crunch through bone and it probably fed on whales and other large prey. The model has an articulated jaw.