Originally Posted by lisa888
I got 3 blue-green chromis 12 days ago. They are in my 20-gal
QT. The smallest one is getting picked on by the other two (mostly the biggest one). His coloring looks off - some of the scales are a darker color. But then later on he looks normal like the other ones. Is this coloration variance due to stress? Or could he be sick? I don't see any white spots/film or anything like that. When I got them the LFS
guy just gave me three random fish - should I have gotten them the same size so one is not bullied? Should I take the little guy back to the store and get a bigger one? Thanks in advance for your advice.
The color variation is due to lighting. Some scales (square spots) will appear really dark or sometimes really light. When I first saw this I thought they had some weird disease.
If you turn off all of the lights for a while and then turn them back on you'll find they all look like that.
One of yours has probably been hiding under a rock or something and when he comes out you see him like that.
It's quite weird haha, but they are fine!
One time I had to cover my entire tank up and there was no light whatsoever inside the tank. When I uncovered it they were all almost black!