A fisherman and a scientist fight back when mossy sea monsters assault women.


Barbara Peeters, Jimmy T. Murakami (uncredited)


Frank Arnold (story), Martin B. Cohen (story) | 1 more credit »





Cast overview, first billed only:
Doug McClure ... Jim Hill
Ann Turkel ... Dr. Susan Drake
Vic Morrow ... Hank Slattery
Cindy Weintraub ... Carol Hill
Anthony Pena ... Johnny Eagle (as Anthony Penya)
Denise Galik ... Linda Beale
Lynn Theel ... Peggy Larsen
Meegan King ... Jerry Potter
Breck Costin Breck Costin ... Tommy Hill
Hoke Howell ... Deke Jensen
Don Maxwell ... Dickie Moore
David Strassman David Strassman ... Billy
Greg Travis ... Mike Michaels, Radio Announcer
Linda Shayne ... Sandy, Miss Salmon
Lisa Glaser ... Becky


Scientific experiments backfire and produce horrific mutations: half man, half fish, which terrorize a small fishing village by killing the men and raping the women. Written by Concorde - New Horizons (with permission).

Plot Summary | Plot Synopsis


From The Caverns Of The Deep... It Strikes! See more »


Horror | Sci-Fi


R | See all certifications »

Parents Guide:

View content advisory »

Did You Know?


Showbusiness trade-paper Variety said of this movie in 1980 that "with Humanoids from the Deep (1980), Roger Corman comes full circle back to his very first film as a producer, Monster from the Ocean Floor (1954) [1954]. Despite costing 100 times as much, new pic has similar premise and same raison d'etre, that of pocketing a profit from drive-in dates" with the picture having "more nudity and gore than carried by any exploitationer in recent memory". See more »


The first attack scene on the boat when the winch engine is heard running then runs out of fuel during the conversation with the boy there is no spark plug wire going to the engine's spark plug, so being out of fuel is the least of the problems. See more »


Dr. Susan Drake: Hold it! We think we know where these things come from, but we have no idea how many there are.
See more »

Alternate Versions

The Japanese DVD under the title "Monster (Humanoids From The Deep)" is the full uncut version including the shot of a man having his head ripped off. It is presented in 1.85:1 widescreen (no anamorphic enhancement though) and looks much better than the slightly cut region 1 DVD. See more »


Remade as They Bite (1996) See more »

User Reviews

Amongst endless cliches, a profound revelation!
14 May 2002 | by roarshockSee all my reviews

As near as I can tell this is the first monster movie to make explicit what has been implicit in monster movies from at least as far back as King Kong in 1933... that monsters just want to have sex with human women. Since this has only been suggested at before, nobody has ever bothered explaining this rather inexplicable behavior, beyond something like "beauty killed the beast". But Humanoids from the Deep explains all (at least for Roger Corman's man-fish critters) and gives a reason for their unusual mating habits... that "these creatures are driven to mate with man now in order further develop their incredible evolution." Alas, if only the 'scientist' who came up with this theory had just pronounced "coelacanth" correctly she would have had a great deal more credibility in my books. Still, on the plus side, it is a fine example of it's genre, where lots of nicely done rubber-suit-monsters tear the men up into bloody shreds so they can strip and ravish the women. If you watch this film expecting anything more... well, why were you?

2 of 2 people found this review helpful.  Was this review helpful to you? | Report this
Review this title | See all 113 user reviews »

Frequently Asked Questions

This FAQ is empty. Add the first question.






Release Date:

16 May 1980 (USA) See more »

Also Known As:

Beneath the Darkness See more »

Filming Locations:

Fort Bragg, California, USA See more »

Company Credits

Production Co:

New World Pictures See more »
Show more on IMDbPro »

Technical Specs


Sound Mix:



Color (Metrocolor)

Aspect Ratio:

1.85 : 1
See full technical specs »

Contribute to This Page

Recently Viewed