Neon Tetra's

[steve hart]

Hi all,
How do you tell the difference between a male and female neon tetra?

Thanks

 

[Truck]

females a a bit plumper in the stomachs whereas males are very slim

 

[Colin_T]

Males have a straight blue line
Females have a kink about half way along their blue line.
The kink is caused by the females being a bit fatter due to the eggs they are carrying.