What in the World Is Sea Snot? And why is it fouling the coast around Istanbul?


FOR MONTHS THE WATERS AROUND Istanbul, Turkey, have been coated with a gloopy film. Sometimes creamy, sometimes khaki, it can appear slightly dreamy or superlatively gross, depending on the vantage. From overhead, it’s almost romantic, like clouds glimpsed from space, white squiggles marbling Earth’s blue. Up close, the stuff is much more phlegmy. The shore-hugging substance is sometimes known as “sea snot,” and it’s easy to see why. It looks like the marine equivalent of a big, wet sneeze.

Sea snot is more scientifically known as “marine mucilage,” and it’s an ecosystem of its own. In a 2009 paper in the journal PLOS One, a team of scientists led by Roberto Danovaro, a marine biologist at Italy’s Polytechnic University of Marche, described it as a “gelatinous” stage of marine snow, the jumble of organic material—such as feces and fragments of dead plants and animals—that drifts from the surface to the ocean floor.

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https://www.atlasobscura.com/articles/what-is-sea-snot