No they can't.
Do not, no matter what put a goldfish and a betta together unless you want the goldfish to die!!!
You should not put a male betta with goldfish's.They are aggressive and will fight with goldfish's goldfish give off ammonia and will kill the Betta's.
No.
Betta fish are best as a solitary fish and are not compatible with goldfish.
No. They are entirely different species. Goldfish are a coldwater species of carp "Carassius auratus" and the Betta or Siamese fighter is a tropical anabantid "Betta splendens".
goldfish. Definatly goldfish. Or betta
no.
If they are not too old and the female is ready, then they will mate.
It depends, if the goldfish are all males (or females) no, but if not of course they can mate.
yes because once i got a betta fish and i put in a tank with a gold fish the first day the betta killed the goldfish so i boult a nother goldfish it did not kill the goldfish because i put them in sepret tanks so that's what you guys should do it because i did it try it people your goldfish will not dy. my goldfish was a fin-nipper that's why it killed it because the goldfish ripped a fin off of the betta so do not put betta fish with goldfish because you never no if the goldfish is a betta.
They are Both fish
Betta's or Goldfish.