Thinking maybe my problem is if I see white dot I also need to see shadow that would be cast. Longer the shadow the higher up in water column. Thinking, say 10-12" crappie unless maybe packed in a tight school I would not even be able to see a shadow???? In the pic above that Rickie posted my thinking has been white dot and shadow cast. The fish in circles I would have thought without seeing shadow they would be just rocks???