Help sexing my 6 inch synsipilum?

[anzo1993]

Hello, I've had my synsipilum for about 2 months now, when i purchased him/her at 3inches no color was apparent but now vibrant purple has emerged and im curious if at 6inch it can be sexed? Any opinions?

 

[Toiletcar]

It’s hard to tell even at that size. IME, if the forehead slopes, male. This was a 13” male.

 

[Gourami Swami]

Males have blue eyes, females yellow, for the most part. Yours look blue? If so, it's a male.
As toiletcar said, the sloping foreheadis a good way too, but hard at 6" with no slope.

 

[anzo1993]

Thank you both for the repsonses, the synsupilum does blue eyes also so i guess we'll say male for now