In western Pennsylvania, flathead catfish are native to the Ohio, Allegheny and Monongahela river watersheds. Flathead
catfish populations have since been introduced to eastern PA waters where they are not native and not wanted. They were first confirmed at Blue Marsh Reservoir in 1997, based on the age and
size of the fish taken, it's likely flatheads had been in the reservoir for some time. Since then flatheads have spread to other non-native waters, including the Schuylkill, Delaware and Susquehanna rivers. Although
angling is not expected to eliminate or control abundance of flatheads in eastern PA waters, anglers can help. If anglers catch flathead catfish in the Susquehanna or Schuylkill River
basins, they are encouraged to take them and not release them, regardless of size....more.
