Great thread, I'm glad so many enjoy these guys. I thought the flame hawks were my favorite and was interested in putting a pair in my new NPS 40 Breeder. But my lfs offered me 2 tiny about an 1.5" longnose, so the question is: Has anyone bonded a pair. Anyway I put the 2 in the 40B yesterday, there was a bit a contention but nothing really out of bounds. One would start and they would tossel for a while, then hang out together, then go their separate way. Then the other would start and same thing, a few times through the evening. They are small enough at the moment that tank is big enough for both of them until they figure it out. They are likely the size where they are both female, or at least in that fluid area.
I say I thought the flame was my favorite because these guys are growing on me. Are the longnose a lot more active and do they usually swim so much, or are they just exploring the new tank. The are so much more active than the flames. Maybe the torpedo shape with the flow helps them fly through the water better than the blimpy flames.