+1, tuxedos and the pincushion/halloween types are definitely reef safe. Black longspines are as well, but they can get a little bulldozer-ish when they get bigger (Like accidentally mowing through some zoanthids if there's algae near them.) I have a black longspine, a tuxedo, a purple pincushion, and a halloween all in my tank. Excellent cleaners, IMO.