[5] Three Americans arrive on a tropical island: Dr. Paul Henderson, a scientist investigating radiation from atomic bomb tests; his beautiful but sexually frustrated wife, Carla; and Jim Farrell, a young Peace Corps representative.

On their way back to the village, a banana tree grabs Carla with its branches, but Jim and Paul rescue her.

The next morning, Alma tells Jim that the beast only wants women; the mutilations are its means of sexual satisfaction.

Paul realizes the animals on the island have the ability to change from their normal state into monstrous forms.

While the villagers await the arrival of the beast, Jim escapes and rescues Alma by firing a flare gun at the creature before it can dismember her.

That night, Carla sees Esteban stagger out of the house, and she follows him into the jungle, unaware that he is the beast of the island, a transformation he undergoes after each migraine.

[6] Ashley said he was keen to accept the offer to make the movie because his marriage to Deborah Walley had just broken up and he wanted to get out of the United States.

[5] Sam Sherman came up with the wedding ring gimmick and tried to persuade Romero to add a phony printed marriage license to the package, but Lynn vetoed the idea, noting that the phony licenses could lead Hemisphere into unwanted legal situations involving minors, such as unwanted pregnancies.

[16] Image Entertainment released Brides of Blood on DVD in 2002, featuring a restored, remastered original version of the film, as well as audio commentary by Sherman and an interview with Romero.

[6][18] Ashley actually moved to the Philippines in 1968, where he lived for the next few years, co-producing several horror films there in partnership with Romero and Roger Corman.

The Los Angeles Times called it "stupid and shoddy in every aspect, but so ludicrous it's sometimes fun", and said that Hills "emerges vital and sexy".

[8] Diabolique magazine said Ashley was "solid and professional rather than outstanding, but he brings a believability that is vital in a movie with such an outlandish plot.

"[19] Hills later said that she had signed to shoot Queen of the Jungle in the Philippines with Ed Wood Jr. in July 1966, but the film was never made.