hey guys i recently bought 1 male alfa cobie and 3 females. I know this because the male is the same size and is fully coloured with orange while the other 3 are plain coloured. The person i also bought them off stated this. My question is i recently added them into my new tank which has other fish such as electric yellows and eureka reds. One of my female alfa cobies has been vibrating. I cant tell if she is shaking around the other fish or the male because there all schooled together but she seems to vibrate and shake. Is this a sign of flirtation because i know only males are suppose to be the ones shaking but she is doing it. Or is it a dominant type thing??