two eyes and a wiggle
n.— «In an act of both optimism and desire, millions of shad fry—so young and tiny they are often referred to as “two eyes and a wiggle”—have been released upstream on many area waterways where dams are being removed.» —“Let that river flow” by Sandy Bauers Philadelphia Inquirer (Pennsylvania) June 4, 2007. (source: Double-Tongued Dictionary)