I snagged a Gshad last spring fishing for hickory shad that was 20.5" long. That thing was a horse! Took me almost 10 minutes to get it in and foul hooking didn't help the matter. They are so thick in spots you snag one every 3rd or 4th cast when they are in their spawning runs. Any lake with big predators like striped bass should not see them take over, but lakes without big mouths may have some issues. A few musky or stripers will put a hurting on them though...
