"sucking fish," 1560s, from Latin remora, literally "delay, hindrance," from re- "back" (see re-) + mora "delay" (see moratorium); so called because the fish were believed by the ancients to retard a vessel to which they attached themselves. Pliny writes that Antony's galley was delayed by one at the Battle of Actium. Sometimes called in English stayship or stopship.