Sex me up?

[assortedsorts]

Just bought 4 little Geos and I was wondering if anyone could possible sex them.
I believe I have a male and 3 females but I could be wrong.
They were labeled as Wild Caught Geophagus Neivae.
They are looooooving the sandy bottom I have as they were on gravel at the LFS.

 

[peathenster]

Hard to say but they should be the same as regular steinys - males bigger with red humps.

 

[assortedsorts]

I think they are too small for their humps to have developed. The guy I was dealing with at my LFS had mentioned he had seen them breeding in the tank already though.
One of them is slightly larger than the other three. Could be coincidence, but that is the one I suspect to be a male.