I recently posted this picture with the hope that perhaps this koi might make the start of a kuro goshiki ochiba shigure.
You may remember this koi has siblings with the many themes of matsukawabake. I knew there was always the possibility that it would develop along those lines.
There is also the chance that the brown in this black based koi would turn to orange or red.
I took this photo a few days ago as it shows a dramatic change in the shifting sumi.
In the side view you can see the sumi and brown battling for dominance. Given the sumi will likely change again, it is impossible to say who will win. For now the brown is barely visible with the sumi masking the appearance.
At this stage I am disappointed with the body shape. The body falls too deep. The back is far too high and gives the tail area a short appearance.