Aquatic Invasive Species

Asian Kelp (Undaria pinnatifida)

The aquatic invasive species Asian Kelp, also known as Undaria pinnatifida, has been found in the San Francisco Bay and Pillar Point Harbor (Half Moon Bay).

This invader has been in Southern California since the year 2000. It has spread into the harbors of Channel Island, Long Beach, Los Angeles, Monterey, Oceanside, Pt. Hueneme, Santa Barbara and Santa Catalina, and into the bays of Mission and San Diego.

Asian Kelp can grow on ship hulls, nets fishing gear, moorings, ropes, docks and other marine structures. Although it can spread short distances on its own, invasions have been linked to boating traffic. Because of its prolific growth and large sizeit can quickly foul natural and man-made structures, causing economic and ecological damage. It also competes for light and space with native populations of marine algae, plants and animals, drastically affecting native ecosystems.

Click here to find out what you can do to prevent the spread of the Asian Kelp.

Quagga & Zebra Mussel

California is asking boaters to clean, drain and dry their boats to stop the spread of harmful invasive mussels. Properly cleaning and drying will also protect boats and help boaters avoid quarantines or being turned away from a water destination. Quagga and Zebra mussels pose a serious threat to our waters and fisheries. The spread of these mussels threatens recreational boating and fishing, aquatic ecosystems and fisheries, water delivery systems, hydroelectric facilities, agriculture and the environment in general. Boaters should be prepared for inspections throughout the state designed to help ensure California’s water bodies remain mussel-free. In addition to being sure to clean, drain and dry watercraft, the Department of Boating and Waterways urges boaters to plan for possible launch restrictions and inspections by calling water bodies before leaving home. Programs and requirements vary and can change rapidly.

Click here to view a boating cleaning guide book, known Quagga/Zebra locations in California and a list of California waterways without Quagga or Zebra mussels w/vessel restrictions.