Rock Snot Infestation in PA Waters

What is this gooey mess floating in PA’s Ohiopyle? It’s called “Didymosphenia geminata“, commonly known as “rock snot”. It’s a form of algae that blooms in freshwater streams, with consistently cold tempatures. For years biologists at universities, wildlife organizations and state agencies cautioned against the spread of “rock snot,” the mucous-textured invasive

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