In the spirit of publicizing grass roots word creation: George vs. mung.
2 casts and about 10 pounds of mung later, I called it quits. I am still trying to find a definition of Mung, but it seems to be what locals call the weeds out in the water on the Cape.
Of course the OED thinks “mung” is “mong” (“A mingling, mixture”) or “moong” (“Either of two legumes, native to India, the seeds of which are an important food”). Which means that George and the Cape locals should get credit for a new usage of the word: “bay scum that tangles your lines and ruins your fishing.”