My betta fish showed out signs that they mated but the female tore off the males fin or he tore his own fins off what dose that mean?
SEPARATE THEM IMMEDIATELY!!!! THEY WILL KILL EACH OTHER !
Betta courtship can be very violent. If the female has laid all her eggs then it is time to take her out and put her back in her own tank.
Treat both of them like royalty -- feed them high quality proteins and keep their water warm and very clean so that they can heal.
The male will tend to the eggs. You may remove any eggs that get opaque or white as they are not viable.
Once the fry are free swimming, they will need to be separated from the male and you should start to feed them.
Do you need instructions as to how to look after them?
Do you have multiple tanks to keep the babies once they get bigger or do you have plans as to what you are going to do with them? Now is the time to do that.