Creatures of Scottish maritime folklore known in Scottish Gaelic as Na Fir Ghorma [the blue men]. The Minch is the passage between the Outer Hebrides to the west and the mainland and Inner Hebrides to the east; it is known in Scottish Gaelic as Sruth nam Fear Gorm [Stream of the Blue Men]. They swam out to capsize passing ships, but could be thwarted by captains skilled at rhyming who could keep the last word. The Blue Men were thought to be especially active near the Shiant Islands in the Outer Hebrides.
See Donald A. MacKenzie, Scottish Folk-Lore and Folk-Life (London and Glasgow, 1935), 85–98.