I have a pair... I started with small one , starting to change to adult color at 4 inches them add a 6 inch almost changed guy .... so long no battle between them ...
Sure not good example as I cramp other large angels together in my 200 g tank ... soon a bigger tank will change it ...
( Currentlly have , emperor pair , majestic, asfur and koran , and some dwarf , knox, mellas, brazilian flameback (pair) , fisher , bicolor and cream (A. xanthurus). Room, intense skimming and heavy feedings to keep peace with them ... )