I wonder if you guys are using sea flea line from blood run tackle on your downrigger poles? this works pretty good on the fleas. I went back to wire cable from braid on the downriggers. I also run more copper lines and wire dipsey's which also help. we can't fish the way we like anymore because of pests but we can minimize the problems they cause. I think our biologists need to do some research to see if or any damage they are doing to are fisheries.