Vortex, I've done it, but I didn't get results that were verifiable, so I stopped. Catching a LMB in school stirs them up, and they don't necessarily stay where they were. Clipping forage seems to get more immediate results because the LMB get active when they see the forage struggling when caught. With CNBG, I usually clip the caudal fin very close to the body. I use take apart orange Fiskars sewing scissors.

AL