FILE PHOTO: Seagulls roost on rocks by the sea covered

FILE PHOTO: Seagulls roost on rocks by the sea covered with a plague of ‘sea snot’, a thick slimy layer of the organic matter, also known as marine mucilage, spread through the Sea of Marmara and posing a threat to marine life and the fishing industry, on the shores of Istanbul, Turkey June 6, 2021. REUTERS/Umit Bektas/File Photo