That I don't know but I remember catching silver bass on harnesses pretty much anywhere under 20 fow when I was a kid. I picked a few up last year around the break walls. White perch I've caught were always out deeper. Not sure what relation the two are or aren't but white perch are actually members of the bass family. Fishkiller might be able to shed some more light on the subject. He's out trolling and fishing more. I've noticed I've caught less sheepshead recently too. Drifting, trolling, jigging.