Originally Posted by peckhead
i got him from the lfs. would it still just be stress?
Probably. Fish fade/mottle when stressed or frightened. Give it some time to color up. Once in the tank leave rhe lights off for 24 hours. Don't give it a fresh water bath! You'll only stress it further. Good luck with this fish. As mentioned, it's not one of the hardiest of butterflies. Hopefully your tank is large, well aged, and has lots of live rock.
It's a Pakistan bf, also called Collare.