A few questions about my female Crown Tail Betta?

[?Gemini Gal!!?]

I just bought one female Crown Tail Beta yesterday at the pet store. I was at first thinking about getting male Crown tail since I've been looking everywhere for one! But, the female is good enough. Well, anyways, I've only had one previous female Beta before and I've both noticed something on them: between their anal fins, theres a white round spot there.I found this when I do daily checks on them, so I can see if anything is wrong with any of them. She couldn't already be able to spawn, could she?! I wasn't even going to try that! She's still a juvenile from what I can tell. But, she is showing vertical stripes that's for sure. I've got a male Beta in my community tank with the rest of the fish, since all the fish that I have meet and are able to be with Beta fish. ( He's about a year or two years old.)

So yeah, if someone could tell me what this is and other things about Betas, that would be awesome! Cheers!! XD

[StarsNeverRise]

The white spot indicates that she is female. All female betta's have them, some are more pronounced.