jet·ty1 /ˈdʒɛti/ Show Spelled [jet-ee] Show IPA noun,plural-ties, verb,-tied, -ty·ing.
1.a pier or structure of stones, piles, or the like, projecting into the sea or other body of water to protect a harbor, deflect the current, etc.
2.a wharf or landing pier.
I have never done it my self but have heard that night fly fishing for rock fish especially black sea bass can be productive, or used to be. A lantern, large baitfish patterns, a sinking line and a stout fly rod were the tools of choice. Also if I was to try it I would go with a fellow fisherman for saftey sake.