Amatitlania Nanolutea Sexing Indicators

[pelleeklund]

I was recently looking at a picture of someones yellow con on another site and it had a much darker spot on its dorsal which was sort of outlined in electric blue. Much more pronounced dorsal markings than on the two I have in my grow out tank. I know it’s not 100% fool proof, but is this typically a sign that mine are male and the one I saw was female? I’ll include pictures of my two if anyone with some experience with them feels like going out on a limb.

 

[duanes]

Above left is a male,,,,,,,right a female,note the colorful notch in her doral fin.

This time female left male right.
Below a female left, malle right

 

[pelleeklund]

Thanks, I’ve been fairly convinced I have two males. Had a feeling that dorsal was an important difference. I couldn’t find much info on sexing them anywhere else, leave it to MFK. I appreciate it.

 

[newworld]

Looks like 2 males…your 2 look like my male, females are normally much yellower

 

[duanes]

This same dorsal color trait is common throughot other Amatilania, and related genera.Female A sajia left, male middle a,d pair right.

Female sajica above left, sajica pair righyt.

A sp Red Point female left, male right
Eve in the related genus Panamensus
Female left elow.....male right


Below Amatitlania myrnae female left, male righ

 

[duanes]

Looks like 2 males…your 2 look like my male, females are normally much yellower

I tend to agree.
With a female in the tank though, my males grew bright yellow, to display to her, if a female was lost, or removed.
The males remained less bright.

 

[pelleeklund]

Thanks again for the responses guys. Duanes, really appreciate the reference photos and the walkthrough. I did base a lot of my guesswork on what I’ve seen with convicts, also the myrnae I’m keeping which I’m certain is female, and also similar dorsal markings in other fish like Trimacs. I will probably only keep one of the males long term, not that they are really bothering each other, just because I don’t really need the redundancy, and when I was ordering them I really just wanted to make sure my odds were better that one would survive the trip across country. Now I just have to decide whether it’s the larger, greener male I keep, or the smaller brighter colored guy. I can’t tell which is dominant, so I’ll mull that over then find another fish keeper to re-home the other. Out of curiousity, given the choice, which would you prefer? Again, much appreciated.

 

[tiger15]

My nanoleutus pair fiercely fighting a giant Vieja bifaciatus in guarding their fry . The video shows that the female has a faint black blotch on the back.

 

[HUKIT]

I absolutely love when the masks turn on.

 

[Jexnell]

Here are some more pics for reference.

These first three are female.

And These three are male. He is the female's above mate.