Join Date: Nov 2018
Location: Oil City PA. USA
Another way to tell is called venting. If you look at the fish from the underside, there you will see two vents, the back vent closest to the tail is the anal vent. the second vent in a male is about the same size as the anal vent and is for fertilization of the eggs . If it is larger then you will find it to be a female, this vent is for egg production. However in smaller fish the venting process is harder to see. Together with the venting and the tail shape, Males being pointed and females being rounded you will have a correct indication of the sex. Another good indication is in the colors of the fish. Males being brightly colored and females being duller. Color only holds true when the fish mature. Younger fish will not really color until they reach adult status.