How well would these two mix?

[sainty333]

I currently have a blackback butterfly (about 3 inches) and would like to add a Copperband (about 4+inches). The tank is a 135 with over a hundred pounds of liverock. Other fish are a false percula clown, royal gramma and a gold stripe maroon clown. No corals to pick at and good water quality.
Thanks for any advice.

 

[kipreefer]

Im not sure what teh balck back looks like but if they dotn resemble each other i would say try it.

 

[sainty333]

anyone else have any opinions or thoughts???? I'll even settle for similira butterfly experiences

 

[Bill2]

i would bet they would. Butterflys aren't usually super agressive. They aren't like angels or tangs.