Help with Clown fish

[windcoast reefs]

Hey every one I just came back from 2 day trip and I noticed my clown fish has some brown marks on his body. He used to be a bright orange and now he is quite a bit darker but he still seems happy. Any suggestions as to what is wrong. Also non of the other fish are showing any signs of distress.

Thanks

[Timbits]

is it a true percula? maybe it is developing some of its black coloration if you had a picture it would definetly help determining the problem

[Canadoc]

Could also be that he's bumping into certain corals (usually Zoanthids), but sometimes star polyps, or torch corals and the like. This is harmless, my clowns have black spots all over, and generally did well (one passed away recently but was older).

[windcoast reefs]

Okay I will try and get some photo's when I can. But he does tend to hand around my zoa's.