If you are disabling sunfish for feeding to bass, it helps to use a pair of sharp scissors to trim fins - clean, fast cuts.
I've got to where when I cut the tail fin off I cut all the way through the spine in the meat. I used to just cut the fin off so the fish would live till the LMB would find it. Now I cut it off in the meat so the fish will bleed out and die.
I probably would not do this if I did not have CC. But with the large CC in the pond, they make quick work of any fish that is disabled.
With the tail fin cut off in the meat the fish still swims away but severely disabled. When I do these off the dock if a LMB doesn't get it, the CC quickly do.
Scissors like Bill says.