I have had all 5 of my girls living in a sorority tank for the past month and they've all been fine. One of them, however, has been exhibiting some strange stuff over the past few days.
First of all, I knew for sure she was a female when I got her. She had an egg tube and very easily recognizable breeding stripes. Lately, she's been getting very aggressive and her fins have grown significantly longer. I also have a tough time finding her egg tube now.
Is she just growing or is this a weird case of mistaken gender? >>
This was her a week after I got her.
The attached images are of her today in a separation cup/thing.