The front of a sawfish shark divides the image in 2. Many teeth line both edges of the sawfish. The background is blurry.

Sawfish Shark, You've Got Too Many Teeth

If you were swimming and looked up and saw this, it'd be a calming sight right?

This is the 'rostrum' of a green sawfish, with teeth lining each side. However, it doesn't really function as a saw, it's something used to swipe side-to-side to stun (or kill) prey.

They're not actually sharks, but they're relatives of sharks and stingrays. And no, they don't attack people and they're an endangered species so don't worry about running into one next time you take a swim.