Bang, you are a man of few words. Many posts, few words.
My clownfish swim every which way. When I first got them, they would swim up under the overflow of my biowheel power filter at night when the lights were off. I thought that was weird until I visited my LFS before they opened one day and their clownfish in the window tank were doing a similar thing.
I now think they were hosting there. Since they have started hosting in my xenia, they don't visit the filter anymore.
Clownfish are fun to watch.