Can you put a Siamese fighting fish in a goldfish bowl?

No. These fish need to be kept seperate. But if you want the goldfish to be eaten, you have to put them together :) You can put a Chinese fighting fish, also known as a betta, in a gold fish bowl.You could keep a betta and goldfish together, not reccamended though. The betta won't eat the goldfish, if it does, it's got srious problems:)