How do you tell the sex of a neon tetra without touching it?

Answer 1

One way to tell the sex of your neon tetra is that the males tend to be more slender, and the females tend to be a bit more round. Additionally, the line that runs along the body of a male tetra will be straight, while on the female, it will bend a bit.

Answer 2

if its a girl the blue band will curve and if its a boy the blue band will stay straight.

Answer 3

The male is bigger than the female.

Answer 4

males are smaller than females