Not necessarily. A Betta is a "Labyrinth fish" but all Labyrinth fish are not Bettas. All the Gouramis are Labyrinth fish too.
Fish that can breath air directly from the surface, such as the ever popular betta, are referred to as labyrinth.
No. Betta fish will attack each other no matter the sex.
Betta fish live in rice paddies in places like Thailand. These paddies are miles long but shallow without much current. So the betta fish slowly developed the labyrinth organ which allows the fish to breathe air from the surface rather then use its gills.
No, snails and betta fish should not be kept together in the same tank as betta fish may attack and harm the snails.
keeping multiple bettas in the same tank is not reccomended
If these are male Bettas they should never be kept in the same tank. Male Bettas (or 'Siamese Fighting Fish') are strongly territorial and won't tolerate the presence of another male. You can keep Bettas just about anywhere (a jar will do) since they're a labyrinth fish and can breathe air. Separate your Bettas.
Betta fish breathe air....yes... that's right... they breathe air. They breathe air because they have an organ by their gills that is called the Labyrinth's Organ which allows them to breathe air. They breathe air by coming up to the surface of the water. Then they gather air in their mouths and hold their breath underwater.
No...betta fish are usually aggressive and might kill the angelfish.
Male Betta splendens fight with other male Betta splendens so the answer is most other fish will not fight with a Betta in the same tank. To try to list every species of fish here would be impossible.
I guess you are referring to the Bettas "Labyrinth" this is a chamber in the skull of the fish that allows it to 'breath' air. This adaptation is what enables the fish to survive in adverse (low Oxygen) water conditions in the wild. When you see a Betta rise to the surface of the water and take a gulp of air he is using his 'labyrinth'.
Same way people do!
no