The pogies "flip" in order to feed. If you were observing them underwater, you would see a moderately tight school with fish breaking off in every direction and then returning to the school. The fish that break the surface are obviously the members of the school that make feeding runs toward the surface.
These feeding runs are made becasue the memhaden that are in the middle to rear of the school only get water that has been filtered by the members of the school in front of them. They will not exhibit this behavior when they are being preyed upon or spooked by heavy boat traffic. When a good pod of bass or bluefish is on them, they will make a big black push or will ball and swim in a tight circle.
JB
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