Zebra OB Male or female

[DjBootleg]

I have three Zebra OBs two medium as one very young.

The two mediums I know one is a male and one is a female (pretty sure). I read the females get a cream color. I attached some pics of both. The one that is turning blueish like a blue tent, the fins and what not. That one is chasing the other one (darker) one around and doing the vibration/shaking thing. I read that's to mate?

Anyway any help or advice would be cool. Thanks.

 

[Andrew McFadden]

The only true way to tell their sex is to vent them or wait it out and see what happens. But they are on zebra and that's what they do to mate. I've also had some due it to others to show dominance