This sucker is also quite rare in our area, although it is more common in the south. It can be identified by its spotted pattern. Each scale on the sides of the fish has a black spot at its base. The spots often look like thin stripes when viewed from afar. The pattern is reminiscent of a corncob. In some areas, they are called "Corncob Suckers". Look for them in the Lower Mississippi or its major tributaries. There are no spotted sucker records on the books in Wisconsin, Minnesota, or Iowa, so it's hard to say how big they get, although the Iowa DNR site does mention that they reach about 3 pounds at six years of age, and I imagine they don't live much longer than 6 years. Spotted suckers approaching 5 pounds have been seen in Minnesota Waters. Light tackle should be used for corncob fishing.