Here are some pictures I found of the male helping the female lay her eggs-
http://www.oneworldinternetcafe.com/betta/betta02.jpg
http://farm1.static.Flickr.com/89/253878683_39e25838de.jpg
http://farm3.static.flickr.com/2222/2269814644_d14d1ce423.jpg
http://s1.hubimg.com/u/2092688_f520.jpg
http://i.ehow.com/images/GlobalPhoto/Articles/4591511/betta4-main_Full.jpg
The female is the one with the shorter fins, and the male has the longer fins. The female is also the one usually upside down.
a pet store
Np, but they will bite. Yes, they will fight to the death.
yes
She breeds with a male Betta Fish.
it looks like they have a big bubble in their side
No. Betta fish will attack each other no matter the sex.
Male betta fish are really colorful and generally larger. Female betta fish are clear colored and small. Male betta fish are probably the easiest to find as well.
Your betta fish is a female if she has smaller fins than an average male.
Yes they will.
The Betta fish want to kill eachother. That's what all Betta fish want to do, that's a natural thing.
the female betta fish are released from a vent while a male embraces her
No.