Disease or deformation? (Clownfish)

[mrhasan]

Update:

The fish is actually not doing good. Its becoming thinner and thinner and very less inactive. Its now swimming vertically too. I have tried cyclopeeze, new era flake and mysis but it seems to be least interested in food and whatever it takes in spits out (even the very very small pieces). Started doing this today. No sign of ich or anything (my tank was left fallow for quite a while after the last outbreak months ago so possibly that is helping).

Any suggestion?