I have a full compliment of snails, he never bothers them and I also have a coral banded shrimp and he swims right by him, he doesn't seem to care. Now, that is just the Melanurus Wrasse and he just went after the hermits when I first put them in. The others crawl all over the rocks and he swims right by them now. The McCoskers Flasher Wrasse has never bothered any of my inverts, hermits, emerald crabs, snails, etc. and I have had him for 3 years and never had a problem. If you are worried about your inverts, stay with a flasher or a fairy wrasse and you should be okay. Also, if your inverts are already in place, I doubt if you would have a problem.