Introductions from elsewhere to 'Atlantic, Antarctic'

n=2 | Species introduction records list
 
# Species Year Period From - To Reason Established in the wild Ref. no.
1 Gammarus tigrinus  1931 1925-1949 Western North Atlantic - Britain  ballast water  Unknown 003224
2 Hyas araneus  1986 1975-present Northern Hemisphere - King George Island  accidental with ships   087513
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