lets Talk Acropora!!!!!!!

[Snowmaker]

So anyways i have tank with quite a few frags of acro and millipora. Anyways i tossed a trio of yellow clown gobys in my tank. Anyways two of them arnt bugging the acros they are just perching and swimming in them, the third being double the size of the rest is being a jerk and nipping at them, like between the branches. No polyp extension or very little during the day im assuming because of this jerk goby. They all have thier polpys out at night though. Will he eventually bug them so much they will rtn???? or will they be alright. My millipora seemed to fix its self where he nibbled. Anyone know anything about clown gobys and maybe how to achieve better polpu extension out of acros??? My birds nest and montiporas all have polpy extension during the day or light times.