Sand Tiger sharks are the only shark species known to eat one another
in the womb. In a "Shark eat shark world" The larger and stronger of
two unborn pups will actually eat its siblings before either are born.
While this is bad for the "dinee" it provides nourishment for the dinner
and eliminates competition for resources once they are born.
Life lesson from a sand shark: Take care of yourself be fierce and strong (But don't eat your brother)!