15. Cookie cutter shark

Nature didn’t need to do this, in my opinion. The cookie cutter shark’s mouth—which leaves the telltale bites on prey that gives the shark its name—is filled with serrated teeth. Frankly, the shark’s mouth is entirely too big for its head. That’s not an anatomical fact, that’s my judgmental opinion. And that’s to say nothing of its eyes, which convey nothing but a lust for more circular bites into the sides of other ocean dwellers.