It has been a few years since we did a complete aging study on Redear. Age data is scheduled to be collected this year. In the last age data set (2008),
the length at age in the spring were; age 1 (3.1-6.7"), age 2 (5.3-8.2"), age 3 (7.1-11.3"), age 4 (10.1-12.2"), age 5 (10.5") age 6 (9.5").
The problem with this data set is that we did not collect many 12" redear. But the growth of the fish starts leveling out at about age 3. So really, you could have a fast going age 4 that is 12, or older fish. I doubt we see any age 3 12"inch redear. And in this data set we saw very few (only 2) that were older than age 4.