The white sucker, Catostomus commersonii, is a bottom-feeing freshwater fish inhabiting North America from Labrador in the north to Georgia and New Mexico in the south. It is a long, round-bodied fish with a dark green, grey, copper, brown, or black back and sides and a light underbelly. When fullgrown, it is between 12 and 20 inches long and weighs between 2 and 4 lb. It will eat almost anything it can, but most commonly small invertebrates and plant matter. Larger predatory fish species such as walleye, trout, bass, northern pike, muskellunge, and sauger prey on the white sucker.