Went out today and they were tough! Water was 37 degrees. Marked big schools but man they were barely touching the hook. Really hard to hook and even harder to feel. They were not tugging at all just sucking it in and sitting there. Verticle jigging was difficult because they weren't pulling or even coming up with the bait so unless you happened to raise your rod tip at the moment it was in their mouth you would miss them. I went with a slip float about 16 inches off the bottom and finally was able to see the bite. No sinking floats, just surface dimples and you had to be fast. Caught 7 decent fish in about 3 hours, missed just as many or more. This is one type of crappie fishing where years of ice fishing has paid off, really similar bite. Got them all on tubes with half the tails cut off.