sea-gulling
v.— «A digger will then take a single stab with his spade, reach elbow-deep into the frigid mud, and yank out his prey. Then he tosses the captured clam between his legs into a five-foot-long sack he drags along. Digging too close to another digger—a practice called “sea-gulling”—is considered to be in poor taste.» —“Digging for Clams In Wilds of Alaska Has a Certain Appeal” by Carrie Dolan in Crescent Beach, Alaska Wall Street Journal Sept. 26, 1984. (source: Double-Tongued Dictionary)