Community question - anthius

[coralline]

Okay, I now have a Clownfish, yellow tang, powder brown tang, yellow tail damsel, and 4 dispar anthias in our 120g.
The anthius were the latest addition (yesterday) & seem to be being flexed on by the tangs. They aren't hurting them, but they are swimming into their group / swimming at them. The anthius hide under/in the one rock sometimes, but they come out & swim/eat too. Are they just establishing the pecking order, or are they not going to accept them?
Would it help if I put more anthius in there to increase their number?

 

[nanomantis]

More would always help. They gain confidence in larger schools. But if the tangs arn't activly attacking them you should be fine.

 

[coralline]

If we add more, would you recommend the same variety... or does that matter at all? They were in with some lyretail anthias where we bought them.
Another question... How can I tell the male of our dispar anthias? The guy we bought them from said he's the most pink of them, but something I read say they will have a red dorsal fin... none of ours do. Anyone know for sure on this one?