Glass Bloodfins

[loafybones]

Hi everyone. We got 4 glass bloodfins today and were wondering does anyone know how to tell what sex they are?

 

[Lateral Line]

As they mature, the female Prionobrama filigera becomes deeper and wider then the male and loses the red colouration to an extent. The male always has more red colour. The first 3 rays of the anal fin are also extended in the female.

Looking through the fish, the ovary and testes should be apparent, and look different.