I've had my blue spot jawfish for over a year now, he's been doing great until yesterday. He's normally a pretty aggressive eater but yesterday and today he hasn't come out of his borrow to eat. I was able to hand feed him some yesterday and tried that today too but he didnt eat today. He looks like his back fin may be shorter than normal like it's rotted off but other than that the rest of his body looks fine. I haven't added any new fish in the last month and I've mixed metroplex in the food just incase he has something contagious. I did put chemiclean in the tank a few days ago and ran an air stone in the sump but did a water change yesterday and added new carbon. Any ideas whats going on? I'll try to get a picture of him but he's deep in the rock, I'm having to look at him with a flashlight.