we have a 28 gal nanocube..water tested fine, but our lawnmower blenney doesnt look right.... his rear body is whitish and has a distinct reddish/purplish patch on his body. He is breathing quicker than usual too.

other fish in tank-clown, watchman goby, pistol, and cleaner shrimp (one disappeared a couple of days ago (??) all seem fine. Our anemone is also opened up, looking normal.

Mr. Blenny is usually very active and entertaining but just isnt himself..any ideas? anyone have this happen before?