- Released in 1972 | Color
- Runtime: 86 min (PAL) | 91 min (NTSC)
- Production Co: American International Productions | Peter Thomas Productions
- Distribution Co: American International Pictures (1972) (USA) (theatrical) | Anglo-EMI Film Distributors (1972) (UK) (theatrical) | MGM-EMI (1972) (UK) (theatrical)
- Directed by George McCowan
- Written by Robert Hutchison, Robert Blees
- Starring: Ray Milland, Sam Elliott, Joan Van Ark, Adam Roarke, Judy Pace, Lynn Borden, Mae Mercer
- Produced by Samuel Z. Arkoff, George Edwards, Norman T. Herman, James H. Nicholson, Peter Thomas
- Original Music by Les Baxter
- Cinematography by Mario Tosi
- Film Editing by Fred R. Feitshans Jr.
Also Known As
- Die Frösche (Germany)
- Killer aus dem Sumpf (Germany)
- Cold green skin against soft warm flesh...a croak...a scream. | If YOU Are Squeamish Stay Home!!! | Millions of slimy bodies squirming everywhere! Millions of gaping mouths devouring... devouring... devouring... | It's the day that Nature strikes back! | ...A terrifying story of times to come when Nature strikes back! | A tidal wave of slithering, slimy horror devouring, destroying all in its path! | Today the pond! Tomorrow the world!