How does a perch find my jig before it can see it?
The lateral line — a row of pressure sensors along the flank — reads low-frequency water displacement out to a few body lengths, well beyond visual range in dim or stained water. A jig lifted and dropped so it thumps bottom and puffs sediment broadcasts exactly the pressure signature of a fleeing invertebrate; fish home in on that, then close the final half meter (foot or two) by eye. That is why an aggressive lift-drop draws fish in even when the water is murky, and why the actual bite still comes on the pause, when the eyes take over.
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