You can try, but it's kind of risky though. Unlike their Arothron counterparts, they resent the presence of other fellow tobies. Considering the fact that they're well known nippers, they can do some serious damage to one another. But, this also depends upon what species you're talking about. I've kept valentini and benetti together with no problem, but whenever I try to mix them with either solandri or jactator, they would just fight like crazy. So it's up to you. You'll have a better luck with more peaceful species.