[kawishiwi]

Originally Posted by Top-Water

Once in a while at this time of year I have seen the white perch school up like you have described, but I have also seen these roaming around in schools as well.

http://www.wildlife.state.nh.us/fish...te-sucker.html

Now that you mention it the fin fringe is something I have seen before but in rivers, and that was schools of suckers. I think you nailed it.