On 17 Oct 2004 17:05:05 -0700, (Gary) wrote:

I have about 15-20 new baby goldfish in my pond this year - more than
usual. I noticed that 2-3 of them are oddly shaped, fatter and
shorter than the others, with strangely shaped fins, and have only a
loose resemblance to a typical goldfish.

What you describe is pretty much how natural variation changes carp to
goldfish to koi over the generations. You can sort to establish
trends.
[dons asbestos gloves and ear protection.]

--
Crashj