hi i have 2 geophagus brasiliensis, very similar to your geos but with metallic blue specs. Just wondering if you know how to sex them? Yours look the same with 1 with slightly darker/brighter colouring than the other, im taking it this is the male 1? Mine are similar 1 being brighter coloured than the other but 1 is forever chasing the other, so im thinking both are males, the brighter 1 being the most dominant. I could get a couple more in hope 2 pair off, but would help greatly if i could get a definate difference in the sexes.