The green humphead parrotfish (Bolpometopon muricatum) is a large beast. It reaches 4 feet in length and can weigh up to 100 lbs. They are found in the Indian and Pacific oceans and are known to be somewhat skittish.
The eat algae and coral. That gnarly beak is what allows them to chomp live corral down into tasty bits. And what is that humphead for? Why, they sometimes ram coral with it to break it up. All the better to eat coral with, my dear.
I might adapting some of that behavior to my own dining experience. Perhaps a head-butted pizza will go down easier.
Here's a video of a school of them. Watch those chompers in action.