yes
I would personally say none, not for their entire lives anyway. You may get away with 2 Fancy Goldfish juveniles for a couple of months, but really Fancy Goldfish need a minimum of 20 gallons each and Common/Comet Goldfish a minimum of 55 gallons each for their entire lives! They get very big, are very messy and need a lot of water volume!
They are called Fry until they are large enough to eat regular goldfish food. Usually after a few months from hatching
Goldfish do not have a breeding season. They can breed whenever the water is warm enough. In an open pond, this would be in the Spring and Summer months. In an indoor aquarium this can be year-round. Thank you very much for your answer!!
At least three months.
No fancy goldfish should not be housed with the more common varieties of goldfish because common goldfish are more aggressive and can swim faster which in turn would result in competition over food causing the fancy goldfish to become stressed and more susceptible to disease. Also common goldfish may damage the fancy goldfish's delicate fins by nipping at them.This (above) may be true in some cases, but I have a 15' x 8' outdoor pond with 2 fancy goldfish, 2 Sarassa Comets (goldfish) and 2 common goldfish and they all get along fine with each other as well as with my 2 Koi. I watch them eat and everyone gets enough, although the fancies are timid when it comes to getting the food. I wait until the others have eaten alot and throw out more food in their direction. Both my fancies are huge and the biggest I have ever seen anywhere.
Approximately a few months.
2-3 months
Goldfish normally spawn once yearly in Spring time.
APARENTLY around 11 months!
The answer is yes if it's purchase size is 1 1/2-2inches For around four-six months a single Moor can live comfortably in a ten gallon. You will however need to upgrade to a 30 gallon after that time. If you desire to add another goldfish make sure it's healthy. Then you must add an additional ten gallons which brings you to a forty gallon, as goldfish consume so much O2 and produce a large amount of waste. Make sure that the 10g is equipped with a good filter and that the tank is cycled properly. Also, make sure you have a water test kit to test your parameters and do those water changes! Good luck with your fish keeping endeavors.
Pond goldfish will be most likely to spawn in the Spring and early Summer months. This is because conditions are best for fry development at this time. The water is by now a warm enough temperature, and there are plenty of microorganisms in the water for the fry to eat once they hatch.
it's dead!