I put a couple of hedgeapple dock posts on Skull Island to anchor the pond end of a 8'x20' planned dock (so Alaska won't be the only place with a "bridge to nowhere"). I also built some medium-density structures, inspired by sputniks and porcupines, designed to attract fish and lures (on a budget). I dubbed these things "triffids" after 1) their tripartite composition (t-posts, black plastic water pipe, and insulated copper wire, all used), 2) their trilateral symmetry, and 3) the fact that seawater will dissolve them. Naturally, with all those "3"s involved, I built 2 of them.
Here's the view of Skull Island overlooking the North spawning beds
and here's a triffid. I think that in addition to being fish attractors, YP might use them for spawning structure.