Cast
Rex Reason
Dr. Thomas Morgan
Jeff Morrow
Dr. William Barton
Leigh Snowden
Marcia Barton
Gregg Palmer
Jed Grant
Maurice Manson
Dr. Borg
James Rawley
Dr. Johnson
David McMahon
Capt. Stanley
Paul Fierro
Morteno
Lillian Molieri
Mrs. Morteno
Frank Chase
Steward
Larry Hudson
State Trooper
Ricou Browning
The Gill Man (in water)(uncredited)
Don Megowan
The Gill Man (on land)(uncredited)
George Sowards
Ranch Hand (uncredited)
Crew
Art
Alexander Golitzen
Art Direction
Russell A. Gausman
Set Decoration
Julius Rosenkrantz
Props
John P. Austin
Set Decoration
Robert Emmet Smith
Art Direction
Costume & Make-Up
Jack Kevan
Makeup Effects Designer
Bud Westmore
Makeup Supervisor
Jay A. Morley Jr.
Costume Design
Roger J. Weinberg
Costume Design
Vincent Romaine
Makeup Artist
Joan St. Oegger
Hairstylist
Directing
John Sherwood
Director
Editing
Edward Curtiss
Editor
Production
William Alland
Producer
