[Mark B.]

I’ve known the angler for years. He was fishing from his boat @ Belvidere.

And, Bowfins are present in the river, from the tidal freshwater through NY State.

In the mid-1990's PA mistakenly stocked Flatheads in Blue Marsh Reservoir which flows to the Schuylkill R. Yes, they are established there, & have since moved in to the main stem Delaware R.