copperbanded butterfly

Any ideas of what this may be? He doesn't appear to be sick, he's a finicky eater but is demolishing all Majano anemone.

Hey guys, first heres a little backstory, i have a 75 gallon mixed reef that i recently just lost all my fish due to ich, it was entirely my fault because i thought i could get away without quarantining. so needless to say i went out the other day and bought a 10 gallon quarantine tank but was...

I have done a lot of research on the Copperbanded Butterfly and was well aware of the risks associated with their feeding habits. That said, I purchased one from a reputable dealer in the area who assured me he was feeding. He is well fed and appears in great condition, plump, no torn fins...