What's in your pond?

I had no idea there were such a thing as butterfly koi.  I've seen ornamental carp in many places but they were all just the usual white, orange, yellow, black, or red.  Writhing in a big bunch looking for food, splashing about (in case you didn't notice they were there) or swimming bits of color flashes in the sun.

Butterfly Koi 1

These are a bit fancy. Flowing fins and scale markings and funny little fleshy bumps on their faces plus a lovely sheen that makes it difficult to get a good photo.

Butterfly Koi 2

Managed to paint these little bits while working on a larger pond-scape.