I know its late but on mine you would be 90% wrong as those lines would be my bait showing up. As in hooks and sinker. Or thats what they look like on mine.
You can see where I pick the bait and sinker up.
http://img.photobucket.com/albums/v6...may2007017.jpg
PVC condo covered with fish.
http://img.photobucket.com/albums/v6...cklake0020.jpg

