Million Dollar Mermaid
Starring Esther Williams, Victor Mature, Walter Pidgeon, David Brian, Donna Corcoran, Jesse White, Maria Tallchief, Howard Freeman, Charles Watts, Wilton Graff
It's a drama and music movie, and has a rating of 6.5 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Italy.