Snowflake "ice" clownfish Dark Spots

[tanksfishtank]

I bought a couple of snowflake clowns a few months ago. About two weeks ago I noticed one of them got a small dark spot on the dorsal fin. I didn't think anything of it, but then I noticed another spot on his tail fin, and shortly thereafter I noticed one growing on the other snowflake. Now the snowflake that had the the spots first is just swimming head first in one corner of the tank. :headwally: Any ideas of whats going on and what to do?

 

[Mabyboi]

Are they hosting an anemone? Are they by chance rubbing up against some coral like octobubble or torch? I've heard of them getting little black spots from stings from these coral..

 

[tanksfishtank]

No there not hosting in an anemone, although, I do have a purple LTA in the tank. The only corals I have in there are a couple of hammers, a couple mushrooms and a couple of polyps. He is still looking ok but still not being very active and still just staying in the corner.