AllMovie

Mara Corday stars in Undersea Girl as skin-diving journalist Val Hudson. While swimming in Yokohama Bay, Val comes across the body of a murdered fisherman, who carries nearly $2000 on his person. The money is part of a $2 million cache which was being transported by a naval vessel during WW II; the ship was sunk by the Japanese and considered irretrievably lost -- at least until now. Joining Val in her search for the rest of the money are her boyfriend, Navy lieutenant Brad Chase (Pat Conway); police lieutenant Mike Travis (Dan Seymour); and mystery man Sam Marvin (Ralph Clanton). A hint to the outcome: one of the treasure-seekers is a low-down, dirty crook. Originally produced by Nacirema Productions, Undersea Girl was distributed by Allied Artists on a double bill with the low-budget western The Persuader.