Joe, this extended version came from a chapbook, and I don't know if anyone ever sang it. For the earliest copy, c 1630-45 look for it in 'Bishop Percy's Folio MS: Loose and Humerous Songs' p. 99, "It was a man of Africa had a ffaire wiffe." Dyer-Bennett', (crab) called it a Connecticutt fishermans song. Arthur Argo's Scots version has it as a lobster. See Sea Crab in Ed Cray's 'The Erotic Muse' and an American version in Randoplh-Legman's 'Roll Me In Your Arms'.