Shark teeths so yea they are cool and some of them are alot of money worth so yea I know it are shark teeths but buyd it from some wone that literally nothings knows about it and he even called it rocks so I said I would bought it for 15 dollars and I know that the big wone is megalodon but I'm not fully sure so please say if they are open and how they are what's name of the sharks ok bye 😉