Milquetoast Henry Limpet experiences his fondest wish and is transformed into a fish. As a talking fish he assists the US Navy in hunting German submarines during World War II.
Henry Limpet
Don Knotts
Bessie Limpet
Carole Cook
George Stickel
Jack Weston
Harlock
Andrew Duggan
Admiral P.P. Spewter
Larry Keating
Nazi Admiral (as Oscar Beregi)
Oscar Beregi Jr.
Fleet Admiral
Charles Meredith
Ladyfish (voice)
Elizabeth MacRae
Crusty (voice)
Paul Frees
Man Staring Into Window (uncredited)
Wesley Gale
Officer at Fleet Admiral's Meeting (uncredited)
Leon Alton
Short Fisherman (uncredited)
Phil Arnold
Nazi Officer (uncredited)
George Bruggeman
Sonar Man (uncredited)
Paul Busch
Sailor (uncredited)
Al Checco
Giggling Girl (uncredited)
Cordy Clark
Sailor (uncredited)
Roydon Clark
Passerby/Naval Officer at Meeting (uncredited)
Sayre Dearing
Nazi Officer (uncredited)
George DeNormand
Naval Officer at Meeting (uncredited)
Dan Dowling
U-Boat Captain (uncredited)
Harold Dyrenforth
Sailor (uncredited)
Louie Elias
Miss Barnes (uncredited)
Lisabeth Field
Lieutenant (uncredited)
Logan Field
Officer at Fleet Admiral's Meeting (uncredited)
Fred Fisher
Nazi Officer (uncredited)
Walter Friedel
Naval Officer at Fleet Admiral Meeting (uncredited)
George Golden
Nazi Officer (uncredited)
Marv Goux
Sailor (uncredited)
John Hale
Officer at Fleet Admiral's Briefing (uncredited)
Sam Harris
Scientist (uncredited)
George Holmes
Officer at Fleet Admiral's Briefing (uncredited)
Joseph La Cava
Naval Officer at Meeting (uncredited)
Mike Lally
Officer at Fleet Admiral's Briefing (uncredited)
Harold Miller
Boat Captain (uncredited)
Charles Morton
Sailor (uncredited)
Henry Norell
Sport Fishmern (uncredited)
Jack Pepper
Helmsman (uncredited)
Montie Plyler
Submarine Captain (uncredited)
Felix Reinsch
Passerby (uncredited)
Waclaw Rekwart
Sonar Man (uncredited)
Heinz Sadler
Old Man in Shipping Office (uncredited)
Scott Seaton
Sailor (uncredited)
Jack Shea
Policeman (uncredited)
John Truax
Scientist (uncredited)
Edward Wermel
Scientist (uncredited)
Feridun Çölgeçen
Lieutenant (uncredited)
Peter Adams