Sexing Channa Marulia

[Jayzao]

Does anyone know how to sex Channa Marulia?
If two juvies are raised together eventually when they head towards maturity one will kill the other as a result of constant fighting.

Is there a way to determine sex to avoid this situation?

Thanks for any assistance.

 

[Jayzao]

Somebody here must keep these fish?
I have had some trouble finding specific sexing information on the net.
Anyone?