“The flathead catfish (Pylodictis olivaris), also called the yellow cat, opelousas, and shovelhead cat, are large North American freshwater catfish. This is the only species of the genus Pylodictis. Ranging from the lower Great Lakes region to northern Mexico, they have been widely introduced and are an invasive species in some areas.
Their native range includes a broad area west of the Appalachian Mountains encompassing large rivers of the Mississippi, Missouri, and Ohio basins. The range extends as far north as North Dakota, as far west as Arizona, and south to the Gulf of Mexico including northeastern Mexico.”
http://en.wikipedia.org/wiki/Flathead_catfish
