I've had my fairy wrasse for a few months he was adult size when I got him(Fully quarantined) . Yesterday he was out just like usual but after about 1pm I haven't seen him since. I fed the tank at 3pm yesterday and 8pm and he still didn't come out. I have a lid on my tank and looked all around it with a flashlight I do not see him. Honestly I'm not super sad because he's kind of a pain in the butt but what on earth would cause this? I didn't do anything to the tank yesterday expect feed. So either he is dead or he is in the rocks hiding? I even checked the sump and overflow baffle but even that has a lid! Can a fish just disappear and die like that?