Spring
Usually Goldfish breed spring and early summer
Yes, goldfish can breed in the home aquarium.
In late spring of early summer is the best time to breed goldfish.
There is no size requirement for a goldfish to be mature enough to breed. The reason I say this is because so very many goldfish are so badly housed and treated that they may become fully mature but only a couple of inches long. Goldfish can usually breed within a year from hatching if they are well looked after.
Yes they can cross breed.
Under normal conditions Goldfish spawn only once a year and that is during late Springtime. Goldfish can usually breed when they are about 2 years old.
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.
yes, goldfish can mate, if you keep your goldfish in a pond... they usually mate in spring, and if you keep your goldfish in a tank, they may mate anytime... but they usually dont do this until they are 3 years old, when they mate, the male will get breeding tubercles which looks like pimples but not red, then they will do a chase, when the female get tired she will release her eggs and the male will fertilize them. of course, you can also try to find ways to make them breed though... anyways... as animals are... they can pretty much all breed including goldfish!
no.
goldfish