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