Hi there . I have a 8 inch red devil with no hump from what I can see . If you were to vent it . What would the difference look like between male and female . And is the same for venting other cichlidsThe link that I posted explains it all in great detail.
Your fish is most likely a male, but hyper dominant females can be very aggressive as well as have a nuchal hump. Venting is the only accurate way to sex your fish.
Thanks