Please help me sexing id for my vieja argentea :)

[DaGhettoChild]

Hello greetings from cichlid lovers indonesia...

I want to buy a pair v. Argentea from one of fish shop, they said that this argentea are pair, nand I confused...
Please help me to sexing

 

[decoy50]

the only way to accurately sex vieja is to vent them. Good looking fish btw.

 

[duanes]

Females tend to have more dark markings, a more gradually sloped profile, and sometimes have less pointed fins.
Yours is very young.
Here is a female, note the spots below the lateral line.

Here is a male. note the lack of spots, severe profile, and fin extensions.

 

[Henryng]

Look like is a female and a male from the shape.

 

[decoy50]

I'm comfortable calling the 2nd fish a male due to the forehead area and steep overall profile of the fish(although this is not always 100% accurate). Its the "female" I'm not certain about. Sub-dominant males can look just the same as females. Need vent pics to be sure.