Director: Arthur Lubin
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.
Don Knotts
Henry Limpet
Carole Cook
Bessie Limpet
Jack Weston
George Stickel
Andrew Duggan
Harlock
Larry Keating
Admiral P.P. Spewter
Oscar Beregi Jr.
Nazi Admiral (as Oscar Beregi)
Charles Meredith
Fleet Admiral
Elizabeth MacRae
Ladyfish (voice)
Paul Frees
Crusty (voice)
Wesley Gale
Man Staring Into Window (uncredited)
Leon Alton
Officer at Fleet Admiral's Meeting (uncredited)
Phil Arnold
Short Fisherman (uncredited)
George Bruggeman
Nazi Officer (uncredited)
Paul Busch
Sonar Man (uncredited)
Al Checco
Sailor (uncredited)
Cordy Clark
Giggling Girl (uncredited)
Roydon Clark
Sailor (uncredited)
Sayre Dearing
Passerby/Naval Officer at Meeting (uncredited)
George DeNormand
Nazi Officer (uncredited)
Dan Dowling
Naval Officer at Meeting (uncredited)
Don Knotts
Henry Limpet
Carole Cook
Bessie Limpet
Jack Weston
George Stickel
Andrew Duggan
Harlock
Larry Keating
Admiral P.P. Spewter
Oscar Beregi Jr.
Nazi Admiral (as Oscar Beregi)
Charles Meredith
Fleet Admiral
Elizabeth MacRae
Ladyfish (voice)
Paul Frees
Crusty (voice)
Wesley Gale
Man Staring Into Window (uncredited)
Leon Alton
Officer at Fleet Admiral's Meeting (uncredited)
Phil Arnold
Short Fisherman (uncredited)
George Bruggeman
Nazi Officer (uncredited)
Paul Busch
Sonar Man (uncredited)
Al Checco
Sailor (uncredited)
Cordy Clark
Giggling Girl (uncredited)
Roydon Clark
Sailor (uncredited)
Sayre Dearing
Passerby/Naval Officer at Meeting (uncredited)
George DeNormand
Nazi Officer (uncredited)
Dan Dowling
Naval Officer at Meeting (uncredited)
Don Knotts
Henry Limpet
Carole Cook
Bessie Limpet
Jack Weston
George Stickel
Andrew Duggan
Harlock
Larry Keating
Admiral P.P. Spewter
Oscar Beregi Jr.
Nazi Admiral (as Oscar Beregi)
Charles Meredith
Fleet Admiral
Elizabeth MacRae
Ladyfish (voice)
Paul Frees
Crusty (voice)
Wesley Gale
Man Staring Into Window (uncredited)
Leon Alton
Officer at Fleet Admiral's Meeting (uncredited)
Phil Arnold
Short Fisherman (uncredited)
George Bruggeman
Nazi Officer (uncredited)
Paul Busch
Sonar Man (uncredited)
Al Checco
Sailor (uncredited)
Cordy Clark
Giggling Girl (uncredited)
Roydon Clark
Sailor (uncredited)
Sayre Dearing
Passerby/Naval Officer at Meeting (uncredited)
George DeNormand
Nazi Officer (uncredited)
Dan Dowling
Naval Officer at Meeting (uncredited)