It’s not the first time, it’s not even the last one, but this is a remarkable episode in a genre that might be called "El Santo with tits." The mix lucha libre/cine mexicano has created a multitude funny of B movies and certainly could not miss stories with female protagonists.
The great Renè Cardona knows a lot the luchadoras because he launches this sub-genre in 1962 with "Las Luchadoras contra el doctor asasino". With his faithful screenwriter Alfredo Salazar the two work several times in this genre and 1968 create this beautiful "La mujer murcielago".
The murciélago is the bat, so we have a bat woman, therefore DC Comics had to prick up their ears.
Cardona's film travels on the fine line of copyright, taking inspiration from the unforgettable TV series "Batman" with Adam West, with the protagonist that if doesn’t wear a bikini has the regular overalls.
Her name is Gloria, she is also a very rich heiress who works against the forces of evil, as well as a strong luchadora. It lacks only for budget reasons (we think) the whole series of bat-gadgets, bat mobile included.
 
What has prevented the complaint by the DC Comics it remains a mystery, as the story of Cardona/Salazar is the classic canvas, with some sexy moments seeing the protagonist.
A mad scientist kidnaps wrestlers to suck the liquid from the pineal gland and create a new breed of hybrid human/fish. The poor and very rubbery version of the Gill-man is the result of his crazy experiments hampered by mujer murcielago hired by the police. It’s not all easy, because our heroine quite die before the final triumph.
Many trash scenes see the star goes around in bikinis and fight the bad guys, or teach the lucha libre to several colleagues. Bad and thugs are very stereotyped.
"La mujer murcielago" is really a great B movie, colorful, cheerful, with several pop songs (always in style "Batman") and a good direction.
Cardona of course is a great expert and exploits with a good photography the beauty of Acapulco turning also several beautiful underwater scenes.
In addition he can counts on a cast of experienced actors like Roberto Canedo, Hector Godoy, David Silva and the extraordinary beauty of Maura Monti. Italian born Maura moved very young with her family in South America and then in the sixties worked as a model, TV presenter and actress, admired for her talent and for her great beauty. After starred in many films in the seventies she decided to retire from the scenes and making sporadic appearances in TV series and she began a career in journalism.