Once labeled invasive, ‘rock snot’ algae now deemed native

MONTPELIER, Vt. (AP) — Researchers say an algae called “rock snot” that was thought to be an invasive species in the Northeast is actually native to the northern United States. The algae, didymo, has caused massive blooms in some U.S. rivers. Fishermen spotted it in rivers in Vermont in 2007, sparking alarm. To fight rock […]