I've heard/been told not to breed two double tails because it often creates deformities in the tail, specifically having 4+ branches in the tail..well last night, I found a beautiful double tail female I really liked and Hubby casually mentioned she would be neat to breed to Hart, my double tail Plakat male. I tried to explain to him why you shouldn't breed double tails together and he asked "Well..is having too many tails and finnage the only down side?..'Cause that's sort of just like having an overHM or rose tail or something, isn't it?"
And he has a point.
Why don't you breed two double tails together, or can you? I'm curious and would like to go into this more. I really know NOTHING about fish genetics.
Also, how much curve is TOO much? Most males I see locally are hump backed and I've been told the older they get, the more prominent the hump gets, but I see a lot of people culling for too much curvature.