Need Help with RBTA

I don't know what it was, but it seems to be recovering now.
Trochus and Stomatella snails like to hang out next to it for some reason.
img_0198 (Modified).jpg

img_0198 (Modified).jpg
 
he's healing still the brighter the pink is the more stressed out he is. I just split mine last week ater stressing him out.

could be clown but i'm leaning on propeller damage or a close encounter with a coral with stronger stingers.
and if you can help it.. stop moving him around and keep the clown away till he's better
 
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