The Whopper Plopper is primarily used by musky fishermen but it will work on other species. The smaller 75 is 3 inches in length and is a good size for largemouth bass. , All versions of River2Sea's Whopper Plopper will catch bass, but the 90 size Plopper will be able to do so most efficiently. At 1/2oz, the topwater lure displaces a lot of water and causes a big commotion on the surface, but the profile is small enough that bass of any size will be willing to bite.