Hi Carol,
Koi that have been intensley bred to perfect thier pattern tend to occupy the position.
Kohaku, showa, Sanke are the best examples albeit there are others..
The gosanke problem was getting quite accute when Toshio Sakai, crossed back in the genes of the magoi or wild carp and then rebuilt thru generations of work ,the pattern. Since them many others have followed his example to the benefit of many favorite color varieties.
Genetics is quite the fascinating study. As a youth I mastered racing Pigeons with line breding and outcrossing to achieve hybred vigor. I could tell when the baby was in the nest and the color it's feathers were becoming whether it would best be used as a breeder or racer.
Koi on the other hand and all carp classed species are just a wee bit more challenging....
Dick Benbow
"The Koi Coach"
member Team Purdin