Why is my platie chasing my other two platies?

Question

I'm guessing they are trying to mate or something

but I forgot how to tell the genders apart

:D

Answer 1

Hi,

Probably mating, the male doesn't have an anal fin where as females do to fan the babies awya or so i got told.

Answer 2

they are aether trying to mate or are being territorial  

Answer 3

Yes, it could be due to trying to mate or it could be that the one chasing the others is doing it over territory.

Answer 4

it could be that the one being chased is a female,and she could be giving birth.the female has an anal fin,where the males is developed into the gonopodium.you can usually tell if the female is pregnant,her belly region is dark and some circles may be visible.some keepers like place the "ripe"female into a breeding net of some sort.

Answer 5

could be trying to mate or like my platy named Shark (you will soon realize why I gave him that name) it is for dominance and they will constantly do this over and over again