Fossil teeth of extinct megalodon sharks have grooves made by other megalodon teeth, hinting at violent encounters between ...

When Nelson had his first encounter with a shark back in 1959 ... famously tells in the original Jaws was based on a real ...

You have to go really, really deep to even have a chance at spotting a goblin shark in its natural habitat. kittisun kittayacharoenpong / Getty Images ...

It's like a real-life ... that's the goblin shark! With its uniquely long and flat snout, it's like something straight out of ...

(Left) Video stills show a goblin shark's protruding jaws (elapsed time is shown in milliseconds). (Right) Goblin shark "slingshot feeding." Jaw movement is extremely rapid: about 0.3 seconds.

13. The Cookiecutter Shark: Doesn't look like much, given its small size. But guess how it gets its name? Its teeth are set in a circular jaw, so that when it bites you it takes out a cookie ...

To learn more about the goblin shark, watch the the full video from the Australian Museum. < "They don't have any commercial value, other than their jaws," marine biologist Charlott Stenberg told ...