A thick layer of slime, known as marine mucilage or "sea snot" is seen covering the beach of the Marmara Sea in Kocaeli, Turkey, June 11, 2021. /CFP
A thick layer of slime, known as marine mucilage or "sea snot" is seen covering the beach of the Marmara Sea in Kocaeli, Turkey, June 11, 2021. /CFP