I only have albino socolofi so I can't comment on their aggression. I've heard that the regular colored socolofis are more aggressive than the albinos. Mine only fight with each other. I do know that if you have enough of each species, (5 or so) they'll pretty much ONLY bicker among their own species. I've kept all of the species listed except regular colored socolofi and I have found that to be true. You may want to stock the red zebras heavier than the rest since they can be really mean. The afras are spunky but not too aggressive. I have a trio of Afr chewere and they mostly leave everyone alone.