October 24, 2017
Mark Anderson pulls a quagga mussel monitoring device from dozens of feet below the surface of Lake Powell.
Stories this photo appears in:
Quagga mussels can disrupt dam flow, remove nutrients and oxygen
Ecologist Mark Anderson still sometimes tears up thinking about March 3, 2013, when an adult quagga mussel was discovered — the definitive sign of a possible aquatic apocalypse — clinging to a boat hauled from the waters of Lake Powell.