Flounder are an incredibly interesting fish. They are the epitome of an ambush predator—to understand that helps to understand where to find them. My experience has been only with the Southern Flounder, and that when I found a good flounder hole, I could just about count on picking up at least a single flounder in that exact location on my future trips if the conditions were similar. Some holes gave up an entire 10 fish limit on the best of best days. Flounder are a fish that can be easily caught from the shoreline if you know where to go.
One of my all time favorite locations is in the pockets of where ferries dock. Why are they so good? In my opinion, tide movement is what an ambush predator relies on—lay there as the bait gets washed past. Ferries, barges, and similar locations provide nonstop “tide”. For me, the ferry would dock in a pocket. That pocket had specific areas that I would thoroughly work over bouncing an artificial lure, waiting for that rubbery snag feeling of a flounder taking my lure. Other favorite locations were points, oyster reefs with gaps, and any obstruction that would disrupt water flow and create eddies. We caught our share using live bait, but my preferred method was to work a 3” or smaller lure on a short shank 1/4 oz, heavy hook jighead. Think crappie sized lures. Curl tails and sassy shads, etc. Pearl and black on bright days, luminescent on darker days. I did usually tip my lure with a natural bait, but I didn’t want it to interfere with the lures action or make it twist, so I would trim my menhaden or shrimp small and straight. Worked like a charm. We had lots of flounder fish fries and stuffed flounder suppers in college. Once gulp shrimp came on the scene, I used those a lot. 2” new penny and 3” glow. No need for tipping gulps.
Im sure those live bait flounder rigs with bucktails are effective when searching for flounder such as drifting or dragging flats. We just didn’t try that sort of thing much, because we always made repeated targeted casts or flips to present it that way.