wow, Those are some pretty impressive fish Cecil.
Impressive growth rates yes but most likely they had fatty livers shortening their lifespans. I had some dying off at three years of age and even scooped some up that were swimming erratically. I would have liked to keep them another year but not sure they would have made it.
I can't say for sure they had fatty livers as I was reluctant to cut any open and lose money. I was getting up to $120.00 for the biggest brooks.