
Breeders have been manipulating the ratio by selective breeding for decades. Many strains of Betta's and Guppies have a much higher male to female ratio because of the demand for the more colorful and bigger finned males. Both my Guppies and my Betta fry are about 2/3rds male and 1/3rd female.random question what are the m/f ratios on the fry is there normaly less male than females or more malesor pretty even