导演 Jack Arnold

Prof. Clete Ferguson John Agar

Helen Dobson Lori Nelson

Joe Hayes John Bromfield

Captain Lucas Nestor Paiva

Jackson Foster Grandon Rhodes

Lou Gibson Dave Willock

George Johnson 罗伯特·B·威廉姆斯

Police Captain Charles Cane

Woman on Boat (uncredited) Loretta Agar

Patrol Boat Dispatcher (voice / uncredited) 比尔·鲍德温

Photographer (uncredited) Jere Beery

The Gill Man (in water) / Lab Technician (uncredited) Ricou Browning

Miss Abbott (uncredited) Diane DeLaire

Cop (uncredited) Mike Doyle

Jennings (uncredited) 克林特·伊斯特伍德

Skipper (uncredited) Jack Gargan

Cop (uncredited) Charles Gibb

Pete (uncredited) 布雷特·加伦特

Mac - Spotlight Party Leader (uncredited) Don C. Harvey

The Gill Man (on land) / Marineland Diver (uncredited) Tom Hennesy

Diver (uncredited) Don House

Charlie (uncredited) 罗伯特 F·霍伊

Newscaster (uncredited) Ned Le Fevre

Police Announcer (uncredited) Sydney Mason

Dr. McCuller (uncredited) Robert Nelson

Girl in Convertible Patricia Powers

Search Party Member (uncredited) Bert Stevens

Policeman (uncredited) Charles Victor

Joe (uncredited) Robert Wehling

Man at Tank (uncredited) James R. Wolfe