yes but because their mouths are so small it won't hurt or draw blood.
Rarely but they can.
Sure. Some bettas may bite the snail's antennae, but most bettas will just think of it as a wandering rock.
Bettas, especially males, are territorial fish, which is why they are best kept alone. Fortunately, betta mouths are small enough it won't hurt much if you get nipped.
Yes. Female bettas of all ages can live safely with other female bettas. Female bettas, unlike males, are not violent. Actually, they are quite docile and calm.
Yes, the "red thing" is actually called a membrane. Bettas will flare out their gills and membranes when he is feeling threatened, especially by another Betta fish.
They should be able to it actually might be to big. i don't know for sure because i stay away from the goldfish and bettas as much as possible.
No, they can live alone or with other female bettas. They might bite each other but won't kill.
They actually sting with their barbels. It is very painful and feels like a bite.
Depends on the temperament. Sometimes they'll come up and tap your finger! A betta fish bite doesn't hurt because they can't actually bite you. Their mouth is too small! But if your bettas are anything like mine, they won't even touch your finger! They're not Piranhas..
Boy bettas have really big fins and are very colorful, and girl bettas are pretty much the opposite!
Bettas originate from Southeast Asia.
Male bettas should be kept alone. Female bettas can sometimes be kept with other fish, but in a large community tank. Bettas need their space!