Tilapia buttikoferi
Lake Tanganyika/Africa
Temp: 78° F - 80° F pH: 8.2
Adult Size: 10"
Food: African Cichlid flake or pellet, algae, brine shrimp.
Temperament: Extremely aggressive. Not suitable for community
aquariums. Best housed alone.
That is a monster!! Impressive fish, but a monster nonetheless. Eventually it will kill everything else alive in your tank if you have anything else living with it. They are extremely demanding of space and would never keep an adult in anything less than a 75 or 100 gallon tank...and that's one adult. They are worse than the South American Red Devil.
Sexing is done by examining the vent for an ovipore if female. I'm not an expert, so perhaps someone else here can contribute to this. In general, male cichlids tend to have a pointier dorsal fin, whereas the females are more rounded.
Hope I didn't disappoint you too much, but better to know now than later. Good luck.