DOUSER
douser: translation
a device used to drive fish in a desired direction by thrashing the water (Newfoundland). See also dasher, thrasher and trouncer. A douser was a twelve or fourteen inch bolt of iron with four iron rings fastened through the bolt at three or four inch intervals. Dousers were bounced off the ocean floor to drive cod into the bag of a seine. Often, four or five douser were used at a time