Golden mussels are shown alongside a ruler for size comparison in an undated image. The California Department of Water Resources is concerned for the health of the Delta after the invasive, non-native freshwater bivalve was recently discovered during a routine inspection at the Port of Stockton last year. (California Department of Fish and Wildlife)

THE EAST BAY REGIONAL PARK DISTRICT is changing how it inspects watercraft to better fight off invasive mussel species. 

The district has long required inspections to prevent the spread of unwanted species into local lakes and reservoirs. For frequent visitors, staff use tamper-proof bands placed between the craft and trailer when the boat leaves the lake, serving as proof the vessel hadn’t launched in other waters.  

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