Hello everyone, im alittle bit concern about my latest addition. I recently purchased a long nose butterfly but my yellow tang keeps chasing it and bum rushing it. it doesnt seem like its nipping at it i feel bad for the guy, dont wanna stress him out. i checked the compatibility chart and it said it was good. they are both fairly small. its in a 60 gallon live rock only. Thanks, im afraid i might have to take him back? please advise.