help me please

[rollin_22]

i have five mollies, two black which i believe are male, and three orange ones which i believe are female... anyhow, the biggest orange one is and has been for the past few hours, like rubbing up against one of the blacks... the only way i can describe it is that it goes up to it really slow and then rolls over on top of it... are they mating? they usually get along fine, but i just dont know what to think.... any help would be greatly appreciated

 

[TCTFish]

To properly sex mollies...look at the anal fin. If it fans down, it is female. If it sticks straight out, it is male. The males will typically swim along the side of the female trying to win her approval and mate. Rolling over the top is just maybe showing off...LOL.