The California Department of Fish and Wildlife declared Pyramid Lake in Southern California infested with quagga mussels. The announcement came after indications of the invasive species were discovered in a Los Angeles tunnel. The finding marks the first time quagga mussels have been found in the State Water Project. Thus far education and enforcement efforts have kept the mussel from critical lakes, including Clear Lake. The quagga mussel is a small, non-native freshwater mollusk that the Department of Water Resources (DWR) had successfully prevented from infesting the State Water Project (SWP) since the species was first discovered in California in 2007.