Dake,
Roddy is right, a variety of goldfish like you described is called a Nymph.
At the spawning of many varieties all sorts of fish can be found, thusly the
description of certain fish being culls. But a cull is something that you
don't want that doesn't mean that it is not a different variety of Goldfish.
This is how the many varieties came about, people taking an interest in a
fish that looked different. In Japan the fish you described is called a
Tomasosa and considered a very good pond fish like the Wakin.
Tom L.L.
"roddy" <roddy.DeleteThis@nospam.rojo.clara.co.uk> wrote in message
news:1056784763.28393.0@damia.uk.clara.net...
> A single tail fantail shaped fish is referred to as a Nymph. A goldfish
> variety which was once recognised; but is no longer. However they should
be
> a little bit hardier than the their bretheren with the more opulent double
> tail fins; well anyway in my mind they are more attractive.
> As Dr-S states it is probably a cull from a fan or veiltail spawning; or
> maybe just a happen chance.
> Roddy
>
> "Dake-Bonoism" <dake_bonoism.DeleteThis@hotmail.com> wrote in message
> news:855251a4.0306271737.1677c1f3@posting.google.com...
> > I purchased a small goldfish at the petstore recently. It's probably
> > about 2 inches in length. It has the triangular body build of a ryukin
> > or a fantail. Yet is has a single tail. It doesn't have the paired
> > tail fin that you see on most fancy goldfish.
> >
> > Does anyone have any idea what it might be? I can tell that it not a
> > common goldfish or a comet by the shape of the body.
>
> >> Stay informed about: What kind of Goldfish do I have??