How can I determine the gender of Neon Tetras?

Question

In my aquarium are some Neon tetra.

I'd like them to breed, but I don't know if they can because I can't determine their genders.

After careful observation, I can identify some females (they have a larger belly). Are there characteristics to help me tell which is which?

score 7 · Accepted Answer · answered Oct 10 '13 at 12:43

7

Other characteristics

The male is slender and the blue line is straighter while The female is rounder producing a bent blue line.
Mostly, the males are bigger than females

Also see : How to Tell If a Neon Tetra Is a Male or Female?

answered Oct 10 '13 at 12:43

Generally I've heard that males are smaller than females. E.g http://www.seriouslyfish.com/species/paracheirodon-innesi/ – toxotes Nov 04 '13 at 19:48
@toxotes Really, I heard the opposite. E.g http://wiki.answers.com/Q/How_do_you_tell_the_difference_between_male_and_female_neon_tetras#slide2 – Nov 04 '13 at 20:08

score 6 · Answer 2 · answered Oct 12 '13 at 04:10

Males do tend to be more slender and females a bit rounder, but honestly, with a large enough school, you'll probably end up with a mix of both sexes anyway. I like a school of at least a dozen. The fish seem to be more at ease in a larger group, and with more fish, you have a better chance of getting a mix of males and females.

How can I determine the gender of Neon Tetras?

2 Answers2