<a href=showthread.php?s=&postid=7815827#post7815827 target=_blank>Originally posted</a> by bigdee65
A single male and 3 females will most likely do well for some time but after a while the females might be killed off one by one. The reason its better to have more females in a group is to spread out the aggression so when you have less females they take a pretty good beating from the male.
I have 1 male and 5 females right now in my 135 and the male is always keeping the females in place. I have one really small female that has not grown much and takes a lot of abuse from the male but still manages to get food and hang out on its own most of the time so I have not seen any problems yet with her.
Also in smaller groups Anthias don't tend to school together unless they feel threatened. But even if they don't school they are awesome and very active fish.