Problem with male Mocha Clownfish

[Dkuhlmann]

Have any of you come across this? This morning he is just hovering around with his mouth open. Not eating either. It could be he took a hit from my Cherub Angel, as he is my tank terrorist :hammer:

So is there anything I can do accept monitor him and see if it gets better on it's own? I don't see any signs of trauma on him at all and he's been eating like a pig lately. Been in my DT for about a month...