Parrot fish and goldfish can not be raised together. Parrot fish belongs to tropical ornamental fish, while the latter belongs to cold fish, and its living temperature environment is quite different. And the parrot fish itself has a particularly strong aggression, hungry will eat small fish, used to chasing bait. If you want to raise this kind of fish together, you need to make a detailed analysis of the fish's personality, living environment, water quality requirements and so on. Try to choose some specially matched fish to raise with them. Can and this kind of fish common raise has: The arowana, the pineapple fish, the map fish and so on in the large-scale fish. Smaller fish like guppies can't be kept with parrot fish.
This fish and koi co-breeding is not appropriate. Because they do not belong to the same kind of fish, they have different requirements for living environment and conditions. First of all, parrot fish is a tropical fish, living in the best water temperature of 25 degrees and above. But Koi is a cold water fish, suitable water temperature should be below 25 degrees. Secondly, koi fish do not eat a few things, the owner of the fish put how much fish food it will eat. And when the parrot fish eat slowly do not know to rob. If these two kinds of fish are kept together, one is easy to survive and the other is easy to starve. More importantly, the former is aggressive, but the koi is not, living together, the koi will be attacked.