from a small business that specialises in ponds or someone who has a pond and koi fry.
Nothing you can do except transferring them to a large tub with a bubbler for oxygen.
If the Koi is large enough it may well eat a goldfish fry but Goldfish and Koi are not fighting type fish so they do not normally bite one another.
Koi fish Koi fish
Koi fish can live in almost any country. Koi are thought to be originally from Japan. Many people have outdoor fish ponds in which Koi are the dominant fish.
Search online for koi Web sites and clubs in your area. Koi USA is a magazine for enthusiasts (koiusa.com). Call local nurseries for a referral to a local fish expert.
a fish, a koi carp
because it is fish
Koi are a type of specially bred carp.
Nope they sometimes eat there eggs
Koi fish usually have two eyes.
The Japanese for Koi is nishikigoi.
The sex of koi fish cannot be determined unless a)you dissect the koi or b)you witness the breeding.