https://globalnews.ca/news/144495/rock-snot-congests-rivers-in-what-is-growing-world-wide-environmental-problem-2/
VANCOUVER - It's nickname says it all.
rock snotworld wideriversgrowing
https://www.livescience.com/45426-rock-snot-spreads-with-global-warming.html
A species of algae, known as rock snot, is not an invasive species, but has been native to much of the world for thousands of years.
rock snotglobal warminglive sciencegetsslimy