trout, bluegills, fallfish, chubs, suckers, carp, if ti swims in the water your fishing you can use it for cutbait. I fillet the fish. then cut the head off then cut the tail off. this gives 5 pieces of bait. if it is a smaller bluegill I will only cut them into 4. you will be surprised what a 5.b channel can eat. I had a 4lb channel smash and eat a live whole rock bass that was 6-7" long. the flathead dad caught I could stick my whole fist in his mouth easy.