That betta has beautiful colours and great finnage. I've heard of a few instances where someone has bought a female betta which turned out to be a young male. Keep your eye on that! Even if it is a male, they go fine in community tanks as long as there's only one of them.
I just did some research to double check to make sure I didn't have a crossdresser or tranny in my tank...and I can distinctly see her egg tube...I saw it yesterday and thought it was just some white poop that hadn't fallen off yet, but after reading a bit more (thanks to you) I now know what it is.

