Here a couple of my larger GSF I caught out of my old pond a few days ago for comparison. I put them back to grow bigger. Anything under 7" I clip the tail off with scissors and put them back for LMB food. Any GSF over 7" that looks good and healthy I put back to grow.
In case you want to read up on them here are some links to old threads.
GSF 100% GSF I have got to where they are not the menace I once thought they were as long as they do not get established too early in a newly stocked pond. I actually have been putting a few in my main pond (but the BG and LMB are well established). I kind of like them but then I like to fish for pan fish.
