I`ve overwintered brood sized tilapia 3"-6" starting out. They make it into the 7"-10" range by the time spring rolls around. They are not too aggressive and I separate the males and females a few times during that period to give the females a rest from the males advances.

What I do notice is the fry and fingerlings are way more aggressive than the brood brought in from the ponds. When the fingerlings near 1-2" they will jump out of the water trying to be first to get to the food.

Forced to work born to Fish