Click here to check out this great Oregon Public Broadcasting- OPB special about Willamette Riverkeeper snorkel surveying of Western Pearlshell Mussels in the Willamette! The largest population of this fascinating species lives at the confluence of the Long Tom River and the Willamette near Norwood Island! Did you know that mussel embryos need to hitch a ride on fish gills for about a year before dropping to the river bottom to grow? Learn more about these incredible, and declining, native freshwater mussels in this beautiful video at OPB! #learnyourlongtom