Originally Posted By: BrianL
Just wondering how common CNBG have the large dark spots on their back. Anyone else have CNBG with the same coloring? It seems to just be the males, and the bigger the fish the bigger the spot. Not all of them have it. I guess it is a trait that is being passed along???






Likely that those fish had a bacterial infection at one time. I've seen it like that on fish that have made it through saddleback aeromonas infections.