Not so, Randy
Algae needs light, but there are all kinds of critters, animal and vegetable, that don't...that thrive in damp or wet DARK places. Mold, mildew, and some fungi, just to name a few. Speaking of fungi that grow in the dark...a friend once had a sign on her office wall that I loved: "Everyone here must think I'm a mushroom, because they keep me in the dark and feed me bullshit."