Shark eat Shark World
Let's get this straight, it really isn't a dog eat dog world out there. Dog cannibalism just doesn't happen that often. For sharks on the other hand, cannibalism is a bit more of a regular occurrence; in fact, there is one species in which every shark becomes a cannibal before even being born. That species is the sand tiger shark (also known as the grey nurse shark or spotted ragged-tooth shark). Sand tiger sharks definitely look scary enough for that title, but don't worry they're unlikely to attack humans unprovoked and their mouths are too small for a fatal bite. Image credit: R.A. Killmer ( Flickr ) For their very first meal sand tiger sharks eat their brothers and sisters in what can best be described as a real life Hunger Games. Enter the arena Just like with many other things in life, this story begins in a uterus. What's unusual though, is that this uterus is an arena for one of natures most violent 'games'. The game begins at f...