I have 2 charts I printed out awhile ago and tried to link them, but 1 is no longer there and the other is a site I can't link to. From looking at the charts it says a clown and wrasse = caution, a clown and hog = caution. That is just a general idea, no specifics on which wrasse or hog. I could not find grammas on these charts (go figure). I'll bump ya though, I dont know enough about the wrasses and hogs to steer you in the right direction.