I would like to add a cleaner wrasse but I am affraid my tusk or bird wrasse will bite it in half like one of them did to a 2" Algae blenny. Whenever I see them at the lfs they seem to be pissing the other fish off,are they good to have? Are the cleaner gobies better? I read somewhere that the tank raised ones don't clean fish,like the wild specimans do.