They're territorial fish. They flare up to make themselves look larger. In doing this, they may scare away possible threats to themselves and their territory.
The male Betta splendens is a larger more colourful fish with much larger showier fins than the female. He will also flare up almost immediately when he sees his own image in a mirror. The females do not do this so readily.
Your betta fish is a female if she has smaller fins than an average male.
Male betta's are larger, more colorful, and have much longer fins. Female betta's are small, less colorful, and have short stubby fins.
Male Betta fish will attract a female by flaring and showing off their long flowing fins.
Well, betta arn't the smartest fish. It probably spreds its fins out because it "thknks" there is another male fish in their so it wants the female to pick him... Also I advise you don't put 2 male betta fish together because they will REALLY TEAR EACH OTHER APART!
Male Bettas have more colour, are larger fish and have much larger fins than the females.
You can put any other tropical fish that does not have long flowing fins or tail and is not aggresive.
Male betta fish are larger, more colorful, and have much longer fins. They also differ in their behavior, and they obviously have different sexual organ systems.
It is pretty hard to tell. Wait until they get older then see which ones have longer fins, and shorter fins.
you can tell if its a boy or girl by the fins the male Betta has long fins and the female Betta has small fins
Typically the males are the ones with the longer flowing fins.
A male beta fish blows a lot of bubbles. so if there are a ton of bubbles at the top of the bowl or tank, your fish is most likely a boy.