Depends what fish you have, if the fish are colourful and have long fins then it'll probably bite it to death, every betta is different.
Yes they would be fine (if they are plants that are ment to live underwater) for the betta splenden aka Siamese fighter fish (assuming that is the betta you are refering to) as it is a tropical fish
It is a kind of tropical fish.
why would you want to kill a betta D:
Nothing. I feed mine tropical flakes! P.S. i have a betta named Frodo lol
yes betta fish have to live alone or one will kill the other.
yes
Not at all. Koi produce enough ammonia to kill tropical fish, and the betta needs a heater.
Betta, goldfish.ex.
The Betta fish want to kill eachother. That's what all Betta fish want to do, that's a natural thing.
Betta fish are very aggressive. They pick at their scales and then they're gone!
Yes, any fish smaller than it. Do not put it in a tank with tropical or saltwater fish because its not certain if it will attack, or even kill itself. Every betta fish is different, so I wouldn't take the chance. If you mix it with another male fish, they will attack each other to death. If you mix it with a female fish, they will mate.
No.