male or female RD

[bunty82]

hi guys just got this red devil from a shop 2day.
This RD was very aggressive in the tank. caught my eyes.
so i brought it right then
please ID its male or female.
size 4 inch.

 

[joedodge]

female

 

[Sab_Fan]

it looks female to me too

 

[bunty82]

it looks female to me too

what are the parameters on which you judge that its a female.
Its a male i guess.
Cos i tried keeping it with my male texas or male green terror.
and all they did is to keep him away from there cave.
Apart from that i checked the vent and its two hole some of thing
one is a small pin size hole and other one is a tube prutruding out.

 

[devilmann]

id say male