Carl Beyer wrote in message ...
I have a small pond (500 gallons). I have been given 2 koi as a gift.
One is 18" the other is around 6. The smaller is a butterfly koi.

Anyway, the butterfly koi seems to swim under the big koi, sort of
hanging in it's shadow.

Just wanted to make sure this is normal, and not something else I need
to worry about.

Carl

I have four large Koi. I just built them a big new environment of
5,000 gallons and they still hang out together, much as you describe.
They seem to be very social creatures. They also don't like sun much,
at least mine don't, so when its sunny them seem to huddle underneath
each other.