So, 3 weeks ago, I got one female Golden Twinbar and one female Assorted Blue Wag platy. Now, all of a sudden, the Blue wag (Crystal) is being slightly aggressive to the golden Twinbar (Angel). Crystal chased her 3 times when Angel tried to approach her, and then they swam together! Now Crystal is chasing Angel again. They were in the same tank at the store, Angel is pregnant, and, whenever Reef and Ruby (the other 2 platies) approach Angel, she acts like they aren't there. She's only focused on Crystal. Also, all the females flashed today, but Angel did it the most. I'm confused. What should I do?