Cover Characteristics: Book Covers featuring Sharks

As I was perusing Amazon for book covers with sharks on them, I stumbled into the "deep sea thriller" and general sea creature horror/thriller book section that I did not previously know existed. And let me tell you, there are some terrifying book covers out there. I'm talking blood-soaked boats and monstrous creatures and stormy skies with tsunami-type waves, all of which would only be, like,...