sentences:  As a general rule large plugs are used for large fish, and small plugs for small fish.Fishermen casting for very small fish such as crappie will use very small plugs, and anglers fishing for large fish such muskellunge or Murray cod will use extremely large plugs.But trophy-sized fish are occasionally caught on very small plugs, and fingerling perch will sometimes strike — and hook themselves — on a plug as big as they are themselves.