Sexing juvenile green terrors

[Jexnell]

Thank you I wasn’t sure since the males I had seen have the long flowing dorsal fin. I’m guessing that grows out later?

Yes, the trailers come with age

 

[Catfish57]

I’m a little confused about sexing the juveniles. My GT is almost 5” from tip to tip, but still not showing nuchal hump or longer dorsal fin. The colors are pretty rich and it’s voracious, but I just can’t know if it’s male or female. Here’s a pic if anyone wants to venture a guess.

 

[duanes]

In all the Andinoacara (whether GT, pulcher, or coerleopunctatous) that I've seen,
dominant males dorsal and anal fins extend to the edge of the caudal, females only about half way.
Below the GTs close cousin, a male Andinoacara coerleopuntatus

now compare the one above fins to the one below

I also find that the bodies of females are slightly more boxy.
Below a pair guarding fry

The male is on the left above, the female below


Male above
In the shot below, the male is the upper individual.
Note how much more streamlined he is than the female the lower individual in the shot