rare goldfish

I mean I know what tosakin goldfish are, they're beautiful fish with long fluffy tails that spread out and curl at the ends. I know there's a long process of breeding them and rearing them to get the perfect tail, and I know they get the tail from the way they're reared. My question is though...

Here r some rare goldfish varieties u should keep an eye out for:scaless goldfish,striped,blue,solid black pearl scale.