This video from England says about itself:
27 Jan 2014
From daily The Guardian in Britain, with photo there:
Columbus crab crosses the Atlantic – big picture
Thursday 30 January 2014 10.56 GMT
This Columbus crab (Planes minutus), just 10mm long, was found among common goose barnacles on a longline buoy last week, washed ashore on the Chesil beach, a natural catchment area for marine litter in Dorset. Native to the Sargasso Sea near Bermuda, it drifted away along the Gulf Stream and ended with many objects from the American and Canadian fishing industry on British shores.