The cave Celeste Yarnall used as a dressing room was also the men's latrine for the male cast and crew members.
Promotion of the film included ads resembling folded ten-dollar bills being dropped on busy city streets.
Sequel to Mad Doctor of Blood Island (1969).
Celeste Yarnall said she only took the role because she was pregnant and needed the money.
According to The Psychotronic Encyclopedia of Film, "At original showings, 'survival kits' containing airplane barf bags were thoughtfully handed out."