Are there even wc bangaiis available anymore? Im pretty sure they have been overcollected, so they dont do that anymore.
regarding same sex pairing (THIS IS NOT A CURRENT EVENT DISCUSSION!!!), I do not necessarily agree. I think perhaps you are right with a female-female group, but with male-male group, both want to be the male type, and complete to dsiplay dominance. I think its hard wired that way. I had two bangaii (I assume were males) fight to the death in a 120. Both actually died from this action (1 about 10 days the other from a torn jaw). I understand your point and agree for the most part, but I think some fish think black and white. Especially in a 12g.
But youve had it work for you, so maybe my luck is bad.