TJ, I'm ashamed to have to admit that I don't know. There have been a total of 4 stockings of HBG since the program began in 2009. I borrowed the stuff to be able to tag the fish in the first two stockings, then fin clipped the other two as a means to identify year. I'm sure there was no tag, but I didn't notice a clipped fin, either. I feel there must have been though, as there was little chance of backcrossing with a BG. Although not impossible of course.
Just one time, I would like to get over the excitement of the catch and actually do what I'm supposed to do, such as taking a scale sample, and identifying the year class of fish. One time.
The way it stands, I would classify this fish as a BG dominant HBG..I think it's an F1, but really can't say for sure.
However, I do have about a dozen <1.5" F(X) HBG in a cage, and they are finally learning to eat bloodworms.. Took weeks to capture that many, as I started last fall. Very curious to see how they perform.