Pseudocheilinops, Leptojulis, and Pseudojuloides are always peaceful, Cirrhilabrus, Paracheilinus, Macropharyngodon, Xenojulis, and Anampses are usually peaceful, Halichoeres are usually peaceful when young and can get less so as they age. Genera to avoid are Pseudocheilinus, Coris, and Thalasomma.