Learn with us online while the Exploratorium is temporarily closed. You can help us reopen—donate today.
Plankton are the very bottom of the food chain—so, although we are several links up the chain, we rely on plankton for our own food needs. Exploratorium biologist Karli Woodward conducts a plankton drag at Pier 15, sweeping a net through the water to survey the astonishing variety of plankton that thrive in San Francisco Bay.