Abstract: An improved self-spreading trawl (13) includes first panels (56T, 56B) which when towed through a body of water (12) separate on opposite sides of the trawl's central axis (62). Portions of panels (56T, 56B) form portions of the trawl's mouth (26). The trawl (13) also includes second panels (56P, 56S) which separate on opposite sides of the central axis (62) from the sides occupied by the panels (56T, 56B). Portions of panels (56P, 56S) form portions of the trawl's mouth (26). Regions of panels (56P, 56S) generate more outwardly directed lift than corresponding regions of the panels (56T, 56B). When towed through the body of water (12): a) a distance separating the panels (56P, 56S) exceeds; b) a distance separating the panels (56T, 56B). Also a braided product strand which includes at least 3 plaits (76, 102), at least one (76) of which is larger than the others (102), advantageously exhibits less drag and vibration.