Drs. P. Sean McDonald (University of Washington) and Thomas Therriault (Fisheries and Oceans Canada) bring nearly 50 years of combined expertise in the science and management of invasive European green crab (EGC). Their presentation will delve into the challenges posed by EGC in the transboundary waters of the Salish Sea, highlighting ongoing science into the species’ detrimental effects on native species and habitats, as well as threats to cultured and wild shellfish resources. Contextualized by a brief summary of EGC larval connectivity by Dr. Lily Engel (Pacific Northwest National Laboratory), they will discuss coordinated strategies for early detection, rapid response, and ongoing measures aimed at mitigating the ecological and economic impacts of this invasive species in the shared waters of the Salish Sea.