My instincts tell me that these were not crappie but who knows. I just have never seen crappie in schools that tight. From my experience crappie move in schools or pods of 25 fish or so and dont move around as much as these were. Most of these images were made as the schools moved past a nearly stationary boat. Crappie move but not that much unless they are making thier way from one feeding location to another.
Any guesses what these were? Shad?