i use the inverted v signal on my lowrance unit and not the fish id. if you are anchored or moving very slow, the fish will show up as horozinal lines instead of inverted v's. once i get anchored i cut the unit off. i dont need it while im anchored. if your unit is still showing the bait balls and individual fish signals under them, then id say its game fish hung under the bait, preying on the bait.