Sexing Pictus?

[stang1]

I was just wondering if anyone knows how yo sex Pictus catfish? We have three and it would be great to know if they are boys or girls.
I've tried Planet Catfish and they have no info. Does anyone know at all?
Many thanks.

 

[Bozza]

i was told they arnt sexable from the an outside observation. but thats wat iv been told cauld b completely wrong too.