Sex Of My Neons

[acula]

Is there a visual way to tell the sex of my neon tetras? i got one thats bigger than the rest and a bit aggressive... is it female?

 

[Colin_T]

the blue line on the male is straight
The blue line on the female has a kink or bend about half way along it.

 

[ALW]

the blue line on the male is straight
The blue line on the female has a kink or bend about half way along it.

Yep, Colins is right

 

[millym]

again as colin said thats right!!
the females have a rounder belly which is what makes the blue line appear to have a bend in it.

 

[freddythefish]

Also the females are fatter and have a more triangular belly...it is hard to see this unless comparing a male and a female so if yours are all the same you won't tell!