Black Percula/True Percula?

[Reef This]

We don't get many opportunities at black perc's up here - I added a true perc 2 days ago into my 75 as my first fish since I put my tank back together, and I came across a black perc today. They are about the same size, I was wondering if they can co-exist together?

It's the only 2 fish I will probably have in my reef, if that makes any difference.

 

[Moonstream]

I assume by 'black perc' you mean the black variant of A. ocellaris, commonly mis-labed as a percula variant. my guess is that they'd be okay, so long as they are not both females. the percula hasnt been able to establish a territory yet, and so long as they are both small, I would at least try it.