Al...Have you asked the tilapia if they will cooperate? lol They will go over or under most nets if they want. I can't sex the buggers, no matter what the size, with or without dye. Like an LMB, I only know a female if it is holding eggs/fry.
FWIW, Overton can and will provide either sex Mozambique tilapia by inspection as fast as he can net them - I have pictures somewhere and M/F was evident to me.
For years I stocked all male Mozambique tilapia in our forage pond for algae control w/o risk of over-population.
Al, I will try to dig those pictures out of my old files if I can find them.
IIRC, Todd was showing Brian M/F ID when we were at his farm last week?
G/
