Oh one more plus for CSBG's. They seem to handle stress quite well. I moved them to a larger cage and larger pond this morning and they were already feeding this evening. Compare that to the yellow perch I transferred: Very poor feeding in the cage this evening. Most likely it will take a few days for the perch to get back to normal.
In addition to intentionally selecting for big appetite and fast growth, I think Bruce has handled and sorted and sized the CSBG ancestors so much that this is another trait they have.