Fingerlings shelter during the day and disperse to find food at night. The size and age of channel catfish at maturity varies, depending on their sex and location. Lower jaw protrudes. Flatheads spawn from June through August in shallow waters of temperatures between 22 and 29 degrees centigrade. They form nests near submerged logs or other protected areas along river banks, and the females lay between 4,000 and 93,000 adhesive eggs, depending on their age and size.
Males guard the nest.
Fishes of the Southeastern United States . Charles Manooch, III, author. Duane Raver, Jr. , illustrator. Illinois Natural History Survey.