they go into a resting phase which is a phase where they use less energy
Fantail goldfish are a hardy breed, strong swimmers and they compete well for food with the ryukin, shubunkin, comet or common goldfish; making these goldfish breeds good tank mates for your fantail goldfish.
yes
Female Fantail goldfish can not get pregnant they lay/scatter eggs when they are chased by males . So you have nothing to worry about.
Goldfish are peacefull fish and do not normally fight with one another.
it has a short tail
Yes, but slowly.
A fantail goldfish can be any of the goldfish colours which can include any or all of the following white, gold, silver, copper, blue, orange etc etc.
Survival of the fittest
They are both goldfish and so can breed with one another if they are of different sexes.
suma nimo
Became a coluar
Fantail goldfish eggs are adhesive and attach to aquatic vegetation. The eggs are light brown, transparent, and round. They normally hatch within 48 to 72 hours.