Originally Posted by weekf
this clown has recently started to host on my torch coral 1 month ago and she always rub herself against the torch coral with her right side at night or even sit on the sand bed leaning her right side against the torch coral could this be the reason but I thought clowns are not affected by corals' sting???
Usually the worst you'll see as a result of nematocysts from corals is what's refered to as melanism. Basically, black/brown blotch's of discoloration. What could have happened though is the fish has injured itself on the corallites. They can be rather sharp.