Herichthys sp? sexing

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What a beauty! The blue substrate makes this fish pop! I've got a couple that I bought listed as Electric Blue Texas Cichlids. I agree you've got a young lady here. Enjoy!
 
Awesome she looks nice n plump very beautiful
 
The best way for people to tell anything about fish gender or species is to get close.
I hope you don't mind, but I edited to get a better view, and lose the tank decor distractions.
 
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Here is the edited shot.
Note the drark pigment in the dorsal, this is almost always an indication that the individual is female in any species of Hericthys. Also the torpedo shape of the profile is a female trait, unless she is the alpha of the tank, and then her profile can change.
The exception to dorsal coloring is during spawning and fry rearing, when both males and females will get dark color in the dorsal.
 
A couple of old threads that may help others, Duane posted some helpful pics in the first link.

https://www.monsterfishkeepers.com/forums/threads/escondido-sexing.570379/

In link below, second pic shows close up of 5" male, and while the female photo in the background is cut off it still shows the difference in body shapes between the sexes. Even without any black showing in the dorsal, females are more streamlined, including in the head region, males are generally more bulky.

https://www.monsterfishkeepers.com/forums/threads/my-herichthys-escondido-cichlids.473791/

I was looking at these threads last night as I just picked up a 5" male carpintis Escondido that at time of purchase I was certain was a male, then later started to second guess myself. Thanks to Duane & JD I am now convinced that my initial impression was correct. :)
 
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Here are a few more examples within the Heroine cichlids of the new world that make the trait obvious in varying degrees
A female Nosferatu pantostictus

a male

a female beanii

male beanii

an exception is female Nosferatu bartoni

but notice the higher profile in the male bartoni

and one last one female Nandopsis tetracanthus

below a male
 
I'm sure it a girl, was trying to determine if it was a carpintis or a cyanoguttatus.

I am pretty sure its a Carpintis due to its pattern being more worm like instead of even dots, because if the pigment color being that of other Carpintis, and because she has never gone half black like other cyanoguttatus.
 
I'm sure it a girl, was trying to determine if it was a carpintis or a cyanoguttatus.

I am pretty sure its a Carpintis due to its pattern being more worm like instead of even dots, because if the pigment color being that of other Carpintis, and because she has never gone half black like other cyanoguttatus.

Yup. Here is a pic of a female cyano I had. Another species that females get the blotch too.

IMG_2040.JPG
 
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