I don't really know about those guys. I can't imagine they are good swimmers, and they shouldn't be with anything but their own breed. You could probably keep 2 in a 29 gal, but they are still goldfish. You'd still be looking at heavy filtration and large water changes. I can't imagine those guys would be good at uprooting plants so heavily planting the tank would greatly help.
I wouldn't even know where to go about finding goldfish like that. They're... so... unique.
Black moors are one of the fancy varieties that can get huge! I've heard of 12+ inch black moors. With all the derpy-ness (lack of dorsal fin and funky eyes) I can't imagine those guys get too large or swim too much, but bigger is always better with goldfish.
For buying one, I'd try to find a breeder. Celestial eye goldfish are really specialized, and I would be hesitant to buy them from a commercial establishment.
my dream goldies are pearlscales. not the ones with the wen, either(i find wens to be ugly). they're just so fat, derpy, and adorable. they DO have swim bladder issues, though. many fancies seem to. :<
I'm not really a fan of the wens either, but I can deal with them on redcap orandas and ranchu (because they're just so freakin cute). That would be a cute, fun doodle. They're basically a ball-fish ^-^ Now I wish I could draw
Many of the "swim bladder" issues with fancies actually come from GI problems. Don't get me wrong, they do have deformed swim bladders and this does cause problems. But a lot of problems stem from poor commercial diets. I had floaters before, but switching their diets got rid of it.
So Sena, how is the comic idea coming along? Any new thoughts? I would love to see something like this come to life.
I am going to start it off, actually, as a boy (or her brother or whatever) who buys a betta, and you'll see emotions in the betta (sick, cold, tired, scared, etc) and I'll end up showing one of the most common things: a betta with a goldie in a small bowl. Because 1. totally drawing a goldie now xD and 2. shows transition and change in a betta, when he gets good care (which the story will explain/show how the girl gets him). I'm gonna make the gal a little dorky looking, in a cute, "lil' sister" way