They are and are not. I am sure a few out of the million plus get buy unclipped from handling in clipping but not much. They do run groups with CWT's that are not clipped to run a blind math test on harvest / survival comparison to the model. Citizen egg box fry are not clipped also. If your thought was that many thousands of smolt go out unclipped you would be wrong with one exception. Somewhere back I recall clipping a trailer not being available and they ran out of time or something.