I don't think I'm seeing signs of Marine Ich (
Cryptocaryon irritans). That is, if the picture is focused properly. That white looks more like a 'smudge' of injury and/or infection.
I see a very ragged fish. Fins broken and split. The white ring around the eye gives the impression that the fish's eye is protruding, but when I compare it to the fish's other eye, it doesn't look that far extended.
I'd say the fish is having stress problems either from a water quality issue, or nutritional issue, or a combo of them. It seems to be having bacterial issues which would be likely secondary from either or both of these sources.
The fish could use an antibiotic treatment and better water quality and perhaps a boost from foods laced with vitamin and fat supplements. I would also immediately add beta glucan to its feed.
For foods/feeding I'd use the following guidelines:
http://www.reefcentral.com/forums/showthread.php?s=&threadid=785228
I'd like to see all test kit/water quality results. This includes the chemistries and conditions (like temp, sp. gr., pH). I'd like to know:
What you've been feeding. How often?
How long you had this fish.
What is your source water?
How do you top-off the tank water?
All other fishes and marine life you have in the aquarium.
Anything you've added, removed, changed in the last 8 weeks with regards to livestock AND equipment AND processes.
For now, perform a large (80%) water change. Use RO/DI source water or DI water only to mix the salt. Match pH, salinity, and temperature of the water you're exchanging. I would get some antibiotic (the previously mentioned Maracyn Two for Saltwater fish is good), and set up a QT to use as a hospital tank for this fish.
