Well they could.... Their a typical schooling fish, if the fish is truly "weak" then theres a reason its being picked off. Otherwise the smaller one is usually the more bullied one, but they don't usually kill them off like chromis. But that's why it's best to have 4+ so the largest ones (the male) aggression is dispersed through more of the group. That's also why if you get multiple species of anthias, you don't get the largest one from each tank at the lfs, don't want to end up with all males
There were my dispars.
