sexing and species

[Vertigon_z]

Good Morning All,

Can anyone assist me in identifying which Geophagus these are? Also are they male or female. I have attached a Pic of both, The suspected female is by the tiki ornament while the suspected male is against the black background. I was told these are surinamensis.

 

[duanes]

I can't comment on species because there are so many that look so much alike, and the difference may be few spots on a certain fin, or a mid blotch one side off center that separates one from the other.
That said Geophagine males usually have much steeper defined profiles.
Here is a couple examples.
Male

female, less steep more rounded below

another species
male lower in the shot female above more in background

At maturity males also seem to get more flowing fins, and sometimes more striking colors
Below male G altirons

 

[Vertigon_z]

Thanks a bunch duanes I might have to wait until they reach sexual maturity before I can accurately determine. I will attach another pic thats more clear in the event it might help someone help me