All koi are the same species. (besides cross-breeds like butterfly koi and ghost koi) Koi are classified into different pattern types and the rarest of those would be the Ki Bekko. A koi that is lemon yellow and overlained with sumi (the black splotch pattern), Copy and paste this web address and look at the photo of the Ki Bekko. http://www.koisale.com/koi_bekko.htm
They get along with goldfish but you'll end up with babies that are part goldfish. I have them in the same pond and that's what happened to me. The main problem with putting Koi with other fish, is sometimes the other fish like to eat Koi.
Nope they sometimes eat there eggs
No the koi and the red fantails tails have a difference with the tails, the red fantail is bubbly and the koi is straight so the koi will get more food and will pick on your other red fantails
Yes pond comets and other pond goldfish get along with koi, however koi can get over 24 inches long when a comet typically doesn't grow more than 12 inches- that's quite a considerable difference in size (which is why its often best to keep koi with other koi and goldfish with other goldfish).
Yes, they won't bother them.the Carp and Koi are among the same family and are scrap eaters. they dont eat other fish, they eat the scraps they find to be tasty in the bottom of the lake or pond. this is why most people dont recommend eating them
No! because tropical fish live in heated water and koi in cold water.
Koi, Japanese goldfish from the carp family, mate like most other fish. The female Koi lays thousands of eggs which are then fertilized by one or more males.
I don't know except do not put goldfish in the same tank as anything else the other thing will die. I know from experience. :*(
A butterfly Koi is simply a Koi with longer and straggly finnage. They are sexed in exactly the same way as all other Koi and/or goldfish. The Koi does not reach sexual maturity until it is about 10 inches long so it can not be sexed until then. Once sexually mature the females tend to have a chubbier appearance than the males and (as with goldfish) the males develop whitish spots (Pimples) on their gill plates and pectoral fins when they come into breeding condition.
No, a Koi is a carp. It comes from the Japanese word Nishikigoi which literally means 'coloured carp'.
The most prevalent danger to Koi are birds. Mostly Blue Heron and other predatory birds. Raccoons and other animals will eat them as well if they are able to catch them.