Carcinus maenas
•Reported to have moved from Atlantic side to the Gulf of St. Lawrence side of Nova Scotia in 1998
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•Collected off Vancouver Island, BC in 1999
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•Maryland to Nova Scotia and California to British Columbia
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The green crab on the East Coast is reported to have moved from the Atlantic side to the Gulf of St. Lawrence side of Nova Scotia in 1998. And then in 1999, the green crab was collected off Vancouver Island in BC.  A jump from Washington state.  So on the East Coast the crab is from Maryland to Nova Scotia and from Califonia to BC on the West Coast.

Canadian records – Jim Morrison, Fisheries and Oceans