A man relaxes on a canoe at the Caddebostan shore, on the Asian side of Istanbul, Tuesday, June 8, 2021, surrounded by a huge mass of marine mucilage, a thick, slimy substance made up of compounds released by marine organisms, in Turkey's Marmara Sea. Turkey???s president has promised to rescue the Marmara Sea from an outbreak of ??ssea snot??? that is alarming marine biologists and environmentalists. A huge mass of marine mucilage has bloomed in Turkey???s Marmara and the adjoining Black and Aegean Seas. Turkish President Recep Tayyip Erdogan said untreated waste dumped into the Marmara Sea and climate change had caused the bloom of the thick, slimy substance made up of compounds released by marine organisms, Istanbul, Turkey???s largest city, borders the sea. (AP Photo/Kemal Aslan), APTOPIX