What do I do with all these heads?

https://preview.redd.it/2iwjh0bfxo9h1.png?width=443&format=png&auto=webp&s=a28b72734b33d14a955eb72ebababa2db298ab60

Someone please help me, I've been committing some environmental crimes against sharks and I ligit cannot figure out what to do with all these heads. I know you can turn the Pufferfish one into a stew but thats about it, the wiki doesnt have anything else.

Thanks!