ReefArtist
In Memoriam
I agree with you Joe, the Gobiodon atrangulatus (Green Gobie) that I'm presently keeping have caused only a little damage. I did have little nips on my A. nana colony and you could tell they where actually eating on the coral. I just watched both very closely and the nana healed without any long term problems. That has been the only time I've seen any damage, about 6 months ago. This is in my old tank which is a 65g and I have two of them - they are great to watch and I'm willing to put up with a little nip in order to keep them. If you are a person that will not tolerate any fish nipping on the coral then it might be wise to select a different fish, otherwise they are great.