Clownfish Shaking

[rfdoc]

I've had 2 false percs for almost 3 weeks now and I noticed every once in a while they shake frantically for a few seconds, like someone does when they are cold and shivering. Is this normal behavior or an indication of a disease? I do not see anything physically wrong with them, no white spots and they both eat well. There are no other fish in the tank, just a clean up crew.

Thanks.

 

[skippy2]

That's normal for clownfish. They are seeing which 1 is going to be the dominant female.

 

[rfdoc]

Cool! Ok thanks skippy2, I was getting really nervous.