Not normally. Only male Bettas have the fight other competition response.
i read that beta males are very territorial. it might just be that the fish is not self aware and believes he is seeing a male that is threatneing. so for him he's just trying to get the other fish scared or to prepare to fight even though there is no other fish.
The males have the large flowing fins and will display when they see another male or their own reflection.
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.
Hi. You can get to know your betta by examining what they do and how they react to things.
The Betta fish want to kill eachother. That's what all Betta fish want to do, that's a natural thing.
No.