I'm kinda stumped on this one, it's a 3 year old lionfish fed mostly frozen silversides but also eats some krill and flake food on occasion. Oh and he ate all my damsels. But 7 weeks ago it just stopped eating. It swims around like normal, there's no rapid breathing but it seems he is shedding some sort of mucus from his body (this started this week). I tried going back to live ghost shrimp and feeder fish and he shows no interest, the shrimp were even crawling across his face and he didn't react. How long can this hunger strike last? His stomach is starting to look a little sunken in. No ammonia, Ph is recently down a little (7.8-8), nitrates 50 (seems I can never get lower than this).