That is a gorgeous hybrid Flaringshutter! I love the black velvet coloring.
I know that "Mirror Carp" are just a genetic mutation of the Common Carp. Perhaps that's all this Mirror Koi is.Sygnus has got to be one of the coolest looking goldfish/koi I have ever seen....I want one! If I only had the water room. There is also a "mirror" koi that I want at my LFS...not sure if it is a hybrid. It is almost robotic in appearance...must get a pic.