California Adds Golden Mussel to Restricted Species List to Protect State Waters

The California Fish and Game Commission has taken emergency action to list the invasive golden mussel (Limnoperna fortunei) as a restricted species, following its discovery in the state in October.

This invasive species, native to China and Southeast Asia, poses a significant threat to California’s water systems and ecological health. The mussels were first found at the Port of Stockton and later detected as far south as San Luis Reservoir’s O’Neill Forebay.

Golden mussels are considered more dangerous than quagga and zebra mussels due to their ability to thrive in a broader range of water conditions. The species is known for clogging water conveyance systems, disrupting water quality, and causing damage to infrastructure. By adding the golden mussel to the restricted species list, the Commission aims to curb its spread by prohibiting live importation, transportation, and possession in California.

This is the first known instance of golden mussels in North America, believed to have been introduced via ballast water from large ships. The Commission’s swift action underscores the urgent need to prevent the mussels from further infiltrating California’s waterways, including the ecologically critical Delta region.

The emergency listing is part of broader efforts to protect California’s natural resources. The public is urged to report any sightings or suspected spread of golden mussels to the California Department of Fish and Wildlife.