it's a loving fish. i kill sheephead all the time by slamming them on rocks.
Sheepshead aren't a rare game fish like pike and muskies are. They're meant to be eaten.
The protection of species such as pike, muskies, bass, walleye, etc. is crucial for the development of their habitats and spawning patterns, as they can't just mass reproduce anywhere they please like salmon and trout. To apply the statement "it's just a fish" so vaguely is nothing but ignorance.