In my original post about my koi cross breeding with my shubunkin, I meant to say they also bred with my comets, not koi.
I originally started out with shubunkin and comets and of course they reproduced. I then added koi and they cross bred with my shubbies and comets.....although it didn't result in fish looking like the pictures
@j.w posted, rather mine were colored, like was discussed in the video.
It took me awhile to realize how many hybrids I had, because they were dark, so would only see them in a sun beam and at feedings. My hybrids grew very fast and I would agree they're strong and hardy......practically bionic - LOL !
I made the decision to just have koi and a man who was doing some pond work for me, said he ran a fish sanctuary, so he took them all. I was absolutely shocked how many there were, when he emptied the pond.......I'd say between 75 - 100 (hybrids, comets and shubbies) , and my pond is only 1700 gallons! My simple filtration system could, in no way, handle that kind of fish load.
Although I love all the varieties of fish, I'm committed to my koi. I have four and one is over 2 feet long. They are pretty long lived given proper care, so I don't want to be overstocked. If it were me ( which it isn't ) I'd rehome the two koi now.....JMO