I guess it would figure that when I chose my original brood stock they were fish that were outgrowing other fish. Along with feed conversion ratios, etc, it seems very plausible that we're selecting for agression as well. I intend on getting some video of this activity this winter sometime. The bluegill weren't content on trying to eat the little guy. They wanted to shake him silly.

Holding a redear sunfish is like running with scissors.