i just got this zen zhu flower horn it was with a group of other juveniles and it was the only one that was jet black. They told me he was the same normal color as the rest when they got him and he randomly turned jet black. When I first added it to the tank it was back to normal colors and it seems as his stress gets lower he gets more and more black. This picture was taken a day after he was added and I think he will end up going back to the jet black color he was at the store. Does anyone have any information as to why he is black in color. I have never seen a black flower horn before and I found somewhere that somebody said it could be a black thunder flower horn?
