If the search yields a film set in contemporary France rather than a magical underwater kingdom, you have stumbled upon the 1980 film that correctly matches the year. Directed by Roger Andrieux, this "La Petite Sirène" is a French romantic drama that uses the Andersen fairy tale as a psychological framework for a very adult story.
If you have grown tired of sing-along crabs and romantic happy endings, the 1980 La Petite Sirène is a gut-punch of sincerity. Watching it on Ok.ru is not just about entertainment; it is an act of film preservation. la petite sirene -1980- ok.ru