The megalodon (Carcharodon megalodon) was a giant prehistoric shark that probably lived between about 16 to 1.6 million years ago. It is the biggest known carnivorous fish to have ever lived. The maximum size of this creature has been calculated to be at 15.9 m (52.1 feet) long and the body mass of about 48 tonnes.
The teeth are similar to great white shark teeth but are much larger and can measure up to more than 17.78 cm (7 inch) long in slant. This one on the photo above is not so big.