possible sick clown

[branman_2000]

ive got a clown fish that has been acting funny today. laying low, breathing a little have and seems a little unbalanced. just wondering what he might be sick with.

http://www.youtube.com/watch?v=9UzFhsfE1fI

[Cerianthus]

Is this recent addition? If not, how long under your care? Hope you already eliminated water as possible culpit.