I went to Arms fish farm a few weeks ago to pick up tilapia. Harrell had two holding tanks side by side. One tank contained thousands of pure Flordia bass about 2" long. The other tank contained thousands of Flordia / Northern mix bass about 2" long. These mix bass were not f1's but several generations removed. Both Flordia and the mix bass were pellet trained. As a demonstration of their behavior Harrell told me to put my finger in the tanks. The Flordia's all fled to the opposite end of the tank and the mix's came up to investigate. Just an interesting experiment for what it's worth.
