Trailer
Cast
George Sowards
Ranch Hand (uncredited)
Jeff Morrow
Dr. William Barton
Leigh Snowden
Marcia Barton
Gregg Palmer
Jed Grant
Maurice Manson
Dr. Borg
Paul Fierro
Morteno
Ricou Browning
The Gill Man (in water)(uncredited)
Rex Reason
Dr. Thomas Morgan
James Rawley
Dr. Johnson
David McMahon
Capt. Stanley
Lillian Molieri
Mrs. Morteno
Frank Chase
Steward
Don Megowan
The Gill Man (on land)(uncredited)