flotsamist
n.— «Where and when something reaches shore depends mainly on weight, wind, and currents. Experts can study flotsam—driftwood, in particular—that help them understand ocean currents and weather patterns. Nature also provides indicators for flotsamists.» —“First Flotsam Fest to wash up at Hatfield Marine Science Center” by Terry Dillman News-Times (Newport, Oregon) Jan. 4, 2008. (source: Double-Tongued Dictionary)