Are there any other reasons that a fish will brush against rocks other than Ich?

[chris009]

My blue tang is brushing against the rock constantly. I was wondering if it could be anything else.

 

[sambasam]

sounds like itch. check his scales if they look a little rotted he could just be injured from something and is getting rid of decaying/dead scales. otherwise its itch. check your perams.

 

[geridoc]

Many kinds of parasites will irritate fish and cause brushing on rocks. Some fish even do this normally (especially wrasses). Check your water params, since ammonia and nitrites can irritate fish lungs, and cause flashing (rubbing) behavior.

 

[blazin2k6]

My orchid dottyback does this all the time. When i feed them or if i am looking at my tank he will just brush up against a LR or sometimes he even looks at himself in the side of the tank and will glance off the glass. I dont know what this behavior is but there is no sign of any illness on him and he eats like a pig.