Yoooo op here. So what it actually was was ammonia burns. I will add a better picture of ammonia burns so other owners don't freak out the way I did and can rest easy. Well. Easy in the sense, they know what's wrong. I had been fridging him, but even before that he had refused to eat and I don't quite know why? He is being acclimated back to his tank where he will be some time in the next few days (gotta cycle) but how long will it be before he's hungry again? what they look like.