Normally I’d say fish are fish, who gives a crap but but it just so happens that my gf has a koi pond in her backyard…I think all of these guys are kois. Oh, and koi’s are not the same as goldfish:

“They are very closely related to goldfish and, in fact, the style of breeding and ornamentation has become very similar, probably through the efforts of Japanese breeders to emulate goldfish.” – Wikipedia (en.wikipedia.org/wiki/Koi)

The gold one in the picture looks like one of the bottom fishes in the following koi fish chart: upload.wikimedia.org/wikipedia/en/d/db/Mango_koi.jpg

I like ducks much more.