Either an aquarium or a pond. NO BOWLS, PLEASE!
All goldfish are freshwater.
The same way you spawn any other goldfish.
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, but only for a very short time, for goldfish are known to grow rapidly.
Yes, but it might be better for the fish to have a tank partner by its side. Make sure it is another Fancy Varitey of Goldfish!
Yes, but your tank size needs to support it. If you mean that a regular goldfish is a long single-tail goldfish, then you need at least a 40 gallon tank just for the 2 fish due to the size potential of the common goldfish. If you mean a regular goldfish as in a round bodied fantail, or perhaps a ryukin, then you need at least a 30 gallon tank for the 2 fish.
Yes, for they are both Fancy Goldfish (It's bad to keep Comets with Fancy varities because most likely the comet will become stressed and die).
The only issue I've heard about concerning housing goldfish together is any big difference in body shape or size. Bigger goldfish might be more aggressive towards smaller goldfish. Also, the more streamlined breeds (koi, comet, etc.) might have an easier time snatching up food, leaving little behind for the pudgier, slower fish (fantail, ryukin, etc.).
the common breeds of goldfish are common, shubunkin, fantail, black moore, orlanda, sarsha comet, comet, ryukin, bubble eye, lion head, rancho, veiltail, celestial, pom pom, and perlscale are the most common.
another gold fish or try asking someone in a pet shop that sells fish maybe they can help
goldfish do not live on land
Goldfish do not get pregnant, but rather they produce eggs. If there is no male around, most often the female will reabsorb the eggs and never actually release any.A female goldfish may get much rounder when full of eggs, but this can be difficult to tell if you have a Ryukin or a Fantail as their body shape is quite round.