Originally published, as part 4 of the Cortes Island Resonance series by the Cortes Community Radio Society.

An unwelcome visitor has arrived on Cortes Island’s shores, triggering alarm among scientists and conservationists. The invasive European green crab (*Carcinus maenas*)—considered one of the world’s most damaging marine invaders—was confirmed in Mansons Lagoon in 2024, marking the first documented sighting in the Discovery Islands. The species’ appearance has set off a coordinated response from Fisheries and Oceans Canada (DFO), the Klahoose First Nation, and Friends of Cortes Island (FOCI).