Check he http://www.mu.edu/~buxtoni/puregold/home.html
I was going to say Whirling disease, but it says doesn't use tail. Could it
have been dropped or something damaging the nerves on one side? Check out
her physical/sick fish form and let us know what they come up with. ~ jan

On 1 Aug 2004 14:37:49 -0700, ) wrote:

He swims like this all the time, and not always at the surface . I
have 3 other fish in there that all seem very healthy. He has been
like this almost since I got him about a month ago. He was the third
fish added. He eats and doesnt look hurt, no spots or anything, but
isnt growing as quickly as the others. All of my pond levels seem to
be well witihin specs. Anything I can do for the poor guy?
You can see the video clip here http://miltonsoffice.com/fish.wmv

(Do you know where your water quality is?)