RTM Sexing

[nbarbagallo98]

Here are my two RTMs, I am positive that the bigger one is a male but unsure on the smaller one. Any opinions?
This is the one I am unsure of.
This one is a definite male just wanted to show you guys.


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[duanes]

its all about the small spots on and below the gill plate
female

male

female


female

male

 

[Ray neo]

Ya, very nice and clear pic,I hope can get a male for my lonely female later,

 

[nbarbagallo98]

Bump


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[decoy50]

I cant tell anything from your pics, but by 2.5 - 3in my females were easily distinguishable. They will have much more color than the males & (like Duanes said) cheek spots for the males. Males take a little longer to fully color up. I found that my dominant male quickly displayed the cheek spots, but the subdominant ones kept me guessing for a while longer. HTH