Invasive Species of California
Aquatic Invasive Species of California
Quagga and Zebra Mussels
Invasive quagga and zebra mussels are a major threat to our freshwater ecosystems. They are small, clam-like creatures that reproduce rapidly and deplete nutrients in the water. They jeopardize power and water infrastructures, damage ecosystems and destroy recreation. The first confirmed find of Zebra mussels in California occurred at San Justo Reservoir Jan. 10, 2008. Quagga and zebra mussels continue to spread and have infested 39 water bodies throughout the state. A map of all infested waters can be found here. The mission of the Invasive Species Program is to reduce the negative effects of aquatic invasive species on waterways of California. CDFW is involved in efforts to prevent the introduction of these species into the state, detect and respond to introductions when they occur, and prevent the spread of invasive species that have become established. Boaters are required to have their watercrafts inspected and cleaned at specific check stations around the state. For information on boating restrictions and inspections please contact the waterbody manager directly.