Preview Knotted Wrack (Ascophyllum nodosum), one of the largest wrack species with distinctive nodules, St Abbs, Scotland, UK NORTH SEA Image ID: 970-689 Artist: Lawson Wood Purchase a commercial license Buy framed prints & more from our print store knotted wrack wrack seaweed sea weed ascophyllum nodosum wracks shoreline shore coastal coastline nodules st abbs scotland uk united kingdom close up close ups close ups close up north sea fauna sealife sea life