It is courtship but be careful during the mating the male will kill the female then the male will make a bubble nest. When the babies hatch be shure to separate the babies or they will eat each other hope this helps
When betta fish flare their gills, it usually means that they want to show off; either to other fish, or to their owner. Sometimes, if you scare your betta fish, they will flare their gills at you just to let you know that they aren't afraid of you. if your betta fish flares their gills all of the time, you may just have a very aggressive fish.
It means he hates you. Bettas flare their gills out when they're trying to scare another betta away, or to impress a female with how large he is.
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.
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.
No.
the female betta fish are released from a vent while a male embraces her