Kemal Aslan, Freelancer (AP Images), Turkey

An aerial photo of the sea at the Caddebostan shore, on Istanbul’s Asian side, Monday, June 7, 2021, with a huge mass of marine mucilage, a thick, slimy substance made up of compounds released by marine organisms, in Turkey's Marmara Sea. This huge mass of marine mucilage, or sea snot as it is referred to at times, is a thick, slimy substance made up of compounds released by marine organisms. ‘Sea snot’ was first documented in Turkey's waters in 2007. Experts warn the mucilage will occur more often because of global warming.

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