People watching the surface of the Marmara Sea covered with sea snot (or mucilage) seen in Istanbul, Turkey on June 6, 2021. Sea snot is a jelly-like substance formed by the excessive proliferation of microscopic plants called phytoplankton. The thick layer caused by the viscous fluid cannot be cleaned despite all efforts and is a serious threat to the biodiversity of the Marmara Sea.
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More footage filed by NurPhoto videographers.