Can you put a female and male Betta fish in the same tank or bowl or will they fight to death?

It's best to only put male and female betta fish in the same tank/bowl if you are breeding them. If they are not breeding and they still stay in the same area, the male would most likely attack the female, so keep the female away!

Also, if you are breeding betta fish, make sure to remove the female betta after she lays her eggs, as the male will care for them and chase the female away.