4 Mollies

[DrKebab]

well i bought this sailfin molly, one of my first fishes that i bought for my aquarium, and a few weeks later we added a female in. I have no clue what the sailfin's gender is but today i just recieved two balloon mollys from a friend. I put them in and my sailfin molly has been behind both of them the whole time. i have no clue what the genders of these fishes are so is this aggressive behavior or are they just getting to know each other?

 

[5teady_2012]

Its a very big problem with male sailfins and female balloon mollies, for some reason male sailfins just want to constantly mate with female balloon mollies so at a guess i would say the sailfin is a male...

Is the sailfins dorsal fin really tall and long when erect? if so, thats a male.

 

[DrKebab]

yeah he can make it come out but only when hes with the female golden molly. the balloon mollies have tall and erect ones too so im guessing theyre males too?