I have a 5 acre pond that has BG LMB grass carp and CC. I have just removed about 160 4-6 pound CC in that past month leading up to placment of these fish in the pond. The ones I'm speaking of were all 6-8 inches. I was going to put them in cages but the guys that delivered them stated they were fast enough to fend for themselves. I also purchased some hybrid BG that I am feeding in the cages.