I have a really pretty fantail that came through my winter just fine, I call him/her Spot. I suspect it is male, as I've never seen another fish chase it, but will watch closer this year, since I can see the fish at the bottom this spring, whereas I was not able to see them to the bottom until about the end of July last summer. I just knew which ones were spawning when they came up to lay eggs on the lily leaves. I could see clearly who was male, who was female. I've spotted 2 that are female and 2 that are male. The most exciting male is my long fin white one with large red spot on his head. His tails are really long, like half his body and tail length. He will definitely be staying when I sell some off this summer. Some people commented on the regular goldfish with long tails that were rounded, maybe heart shaped. I see that a Shubunkin with "heart shaped" tail is called a Briston Shubunkin.
In trying to identify my 2 different fantails that I have currently in my aquarium, waiting for warmer pond water, I looked at my cheat sheet.
The two fantails I have are very different. One is exactly like the one in my pond, VERY large belly, and tri tail. The tail is not extra long, but longer than short, if that makes sense.
The ones with the large belly and "camel hump" are called Ryukin. My fish that is NOT pot bellied, is white, with red spot on head, and a red spot on each section of fantail plus the dorsal fin. Viewed from above, looks like it has 3 red hearts on it's tail. Very cute! This one I think would be simply a Fantail Goldfish, according to the pictures I've seen of them. I suspect it's belly will get larger as it grows, but so far it is not anything like the big bellied Ryukins I have. I'm anxious to get them outside to see if any of them decide to join the breeding frenzy this spring. :razz: