Sexing the flower horn can be attempted the following way: The most accurate way is look at the anal pore of the fish. The male fish has a V-shaped anal pore. As for the female, it will have a U - shaped anal pore. Generally, it will be easier to identify the sex of the fish when it is around 4 inches in length. Breeding should be typical of any of the large parent stock like Cichlasoma Trimaculatus or Cichlasoma Festae.