A few years ago, one of my nieces started breeding betas for a school science project on genetics. It didn't take long for her grandma (my mother-in-law, whom they live with) to get caught up in it and it turned into a project that lasted about three years. I remember visiting and the entire wall-length fireplace mantle and every available tabletop would be covered in cups holding young betas, and many different tanks with mating pairs and bubble nests and baby betas. They would sell the young to pet stores. Eventually it got to be more trouble than it was worth and they gradually worked their way back down to two standard fishtanks and no betas at all. It was always a lot of fun scanning through the stacks of cups looking at the beauties they produced....they were WAY nicer than the pathetic little creatures you usually find at pet stores.