Water Gardening: Post Dramatic Pond Disorder, 1 by BogweedBuck

BogweedBuck wrote:
Well, there were more there prior to 2 weeks ago, but the mix is about the same: koi, Shubunkin, Sarasa, and a couple generic comets. Starting today that'll change to include some gambusia (mosquito fish, aka: wild guppies) for the upper basin that feeds the waterfall. :o) (thanks to blkwolf)

Of the koi, all but 2 are pretty common domestic and butterfly koi, with some others that are of unknown origin. One is directly from Japan and the other is from Japanese stock raised / bred in Israel. The one directly from Japan was supposed to be a Hikarimono, Gin Matsuba koi, but it has since developed a red spot on its side so it's no longer a show fish nor does it properly qualify as being a "gin matsuba." [Hikarimono are single color metallic koi: gin matsuba is the silver ones] The one from Israel is a Shusui koi that seems to be true to the type of fish that I paid/hoped for. [Shusui are doitsu koi (scales along dorsal and lateral lines only). They are blue-grey with dark blue scales along the dorsal and lateral lines and red on the sides and fins]. Who knows ... they're ALL fun in their own way and each seems to have distinctive traits that are each enjoyable.

The shubunkins are from last year. They are a beautiful fish whose history traces back to china rather than Japan, and tend to be a great deal more hardy and disease resistant than koi, which hail from Japan. Sarasa are also originally from China, but have coloration is more of a true red than the orange common to your generic comets. In the end, they're still a form of goldfish like all other comets.

Here's a so-so picture of the main group of fish.