Sounds like the little one is just lookin' for some shade! Maybe even a
little protection - they're very social, and if they were both just moved,
it would be normal to have them stay close to each other until they get used
to the new surroundings.

Keep a very close eye on ammonia and nitrItes: an 18" fish can produce a lot
of "stuff", and your filter may not be ready for it!

Lee

"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

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