[luke frisbee]

their DNA computer program's intense proclivity towards RANDOMNESS/DIVERSITY.

You've got an idea what the koi was developed from? ...pretty much it was a black carp.
Now if a black carp can be so easily modified to have such a bizarre palate of colors then why haven't other fish been taken and done the same with?
Catfish are doitsu multi-whiskered koi, right?
they've been "domesticated" (JasPR think koi have been domesticated so i am using his definition of domestication) as well. How come we don't have 70lb blue cats in our ponds with sanke patterns? The reason is the same as why it hasn't happened in most fishes..Most fishes have a different strategy when it comes to deciding how tohave a successful "next" generation. Koi do it like carp do it..have MILLIONS of offspring within their life and have as much variety as possible and then whatever Mother nature can throw at all of their spawn from all of their spawning one or two can live to do it all over again.
RANDOMNESS within the DNA as a strategy for success.
the strategy of a black carp's population continuity is to throw all the variations possible within the given parameters of the two carp that breed...
Carp can breed and survive just about anywhere...why...because they try to throw every possible combination within their control into the next generation in an attempt that one or two will have the right genes to survive..as much color variatin, as many behaviors, as much definition in fin size and body shapes, and as much metabolic diversity as possible. All the losing combinations get eaten or die (and get eaten). Just one has to survive the conditions inwhich it is hatched and lives its life within, however the next generation might have different conditions so a carp throws all the possibilities it is limited to into the next generation as well...
through one generation's existence more carp that are greagarious might be advantaged, in the next it might be those that are timid may be the majority left when it comes time to breed....
Same with color... one year lighter carp might be less seen, but in a couple of years conditions might give the advantage to the darkest of carp..so the Variations all need to be kept within the DNA and produced in the next generation...
And one of the variations was "spots", and another is color. Neither were found to the extent that is seen in the GC's of the koi world....but look at a spawn and you could find some of the "black carp" swimming amongst "koi."

And 200yrs ago, the Japanese for some reason favored keeping the "odd" colored carp. They had to keep some adults to use for breeding the following year so why not the interesting one. Now an "interesting" food carp back then could have been as simple as having one or two lighter patches...but if the farmers kept that one then next year a few might be spawned that were perhaps more splotchy and those were more interesting, and since only a few were kept for the next year, the Splotchiest probably lived, the rest were served with rice....Culling pre-koi for koi.

So while the japanese subsitence farmer kept tapping the blackness out of his pond he didn't get rid of the basic survival repopulation strategy that for eons has been at the heart of all things CARP... make as much variation as you can in your offspring so that whatever conditions they must live in a few may survive.
But what the farmers did was allow for the overall color to shift slightly to more and more splotchiness and more and more variety in discernable colors..
IF the common carp did not have at its core to throw as much variation as genetically possible into each generation then koi would NOT exist. It is through that strategy that enough variation showed that caught the eye of the japanese Farmer and got koi started and continues to aid in the improvement in color and pattern in the koi of today, and will in the future.
This strategy is double-edged, as while it makes new and better koi it also produced a ton of crap. And always will. Koi Still have the DNA program that passes all the possible combinations of color and pattern into the next generation.As koi farmers pick the extremes out of the spawn they tap the color and patterns in that direction. However the strategy will be there until me can manage DNA on an atomic level.