Dogface puffers are considered to be the least aggressive Arothron's and usually not aggressive towards other fish except perhaps lionfish or triggers (depending on species). They are quite hardy, but do require at least a 125g display and, as usual, need to be quarantined (at least dewormed). For the most part you can expect them to also consume various corals, which can be somewhat curbed, along with ornamental shrimp (mine doesn't, most do).