110 gallon tank contains 1 large maroon clown, 2 ocellaris clowns, 2 allard's clowns, 1 blue hippo tang, pistol shrimp, watchman goby, and various snails/crabs. Tank has been setup for 3 years now and all these fish have been in there for at least a year. Yesterday when feeding I noticed the maroon clown looked like something from a freakshow. Both eyes clouded over, large pimple-like lesion near it's mouth, and some large spots of discoloration (light colored, almost white) in various areas over it's body. Not small white dots like ich though. It also appears to be either blind or has no appetite because it didn't go for any of the food (and it is usually a voracious eater). It just hovered in it's usual spot in the tank even though all the other fish were darting for food. All other livestock appear just fine. What in the heck is going on here?