My male Melanurus has a taste for vermitids, feather dusters, any freshly molted shrimp and he throws snails at the walls/rocks. He might just be rogue as I am good at getting rogue fish. Had an SPS munching BiColor Blenny and a Zoa munching FoxFace.My Mel doesn’t bother my cleaner or blood red either. I’m guessing the smaller peppermints are more appetizing!