Al, here's pictures of M/F ID for sexing your Mozambique tilapia. Overton's hands on ID for my photos many years ago.
I have stocked tilapia for so many years, I take them for granted... cool

Male Mozambique Tilapia


Female Mozambique tilapia



N.E. Texas 2 acre and 1/4 acre ponds
Original george #173 (22 June 2002)