I have had this fish for over a year now and yesterday I noticed it has blotches all over and is twitching excessively. It is not acting normal and is hiding and not swimming around much. It is housed with a heniochus butterfly and a cleaner shrimp. I have not added anything new since I got the scopes over a year ago. I already have a new tank set up for them in an upgrade that will be ready soon, so I cannot loose this fish as it is the reason I got an upgrade. I attached some pics that show the blotches. Can someone please help me with this and identify what this could be and some treatment I can help it. All my parameters are in check.