Sounds like a stingray to me. I had a similar experience off the jetty at Indian River Inlet (near Rehoboth Beach Delaware). 20 minutes of running and reeling and then a bird's nest on my conventional reel. Finally the beast showed himself at the surface. Had to be 4 feet across. Thank God he broke the line, I had no idea how I was going to release him. Though it was fun imagining I had the world record striper on my line.
AtomAnt
AtomAnt