Spirogyra - Filamentous Green Algae - YouTube - 3 views
-
Roland Gesthuizen on 11 Feb 13"This particular algal species, commonly found in polluted water, is often referred to as "pond scum". As the movie switches to a 20x lens and then the 40x, watch closely, toward the center of each cell in the strand, for the cell nucleus. It's right near the middle and shows as a round object that is near transparent, but once you see it, you will see others. "