They are all the same species so they all require identical treatment and conditions to breed successfully.
If you mean like what breed of goldfish you have then that should be fairly easy. I determined what kind I had by looking at his markings and going on wikipedia. If you go to Wikipedia.com and type goldfish in your search bar then scroll down there will be pictures of goldfish with the breed next to them. It is fairly easy and that's how I found out what my goldfish were.
Goldfish are pretty easy to keep.
Yes, goldfish can breed in the home aquarium.
Usually Goldfish breed spring and early summer
In late spring of early summer is the best time to breed goldfish.
Yes they can cross breed.
my house
Well, they have to be mature also, which is about a few years of age.
No. A goldfish can only breed with other Carassiusspecies.
Spring
no.
goldfish