No, really, maybe we're near to a HUGE SCIENCE FAIL from my part, but aren't teeth... bones? Isn't the jaw a bone? Of course they are... Isn't the d*mn thing an INVERTEBRATE?
As you can see from that site, it is very real. Kind of weird, as octopi have a sort of beak, I thought squids did too, but you know, the difference between a beak and teeth is kind of slim.