Red Zebra genetics

Red Zebra's - Pseudotropeus estherae, are generaly described
as 'red' (various shades of orange) females and 'blue' males.
OB females are also known.

Ok, my tankful of juveniles have grown to young adults and
I have about 10 'red' and 2 OB . No other species have
ever been in with them. and No males - yet I just had
a female spit about 20 fry, and another two are 'holding'
One of which is an OB.

OBVIOUSLY, there's male in the tank! The other OB, is
beginning to show shades of very pale bluish spots. I
suspect that is the male, but why isn't OB males reported?

The 20 fry are about a week free swimming and are split in
color between the 'red' (orange really) and brown! (perhaps
these are OB's??)

Is there this much variaty in the estheraes? Will I be possibly
seeing blue males at some point? Or are there really a possible
split in these species?

Bob