https://www.imdb.com/title/tt0088161/

https://en.wikipedia.org/wiki/Splash_%28film%29

Splash ( 1984 ) was an American Romantic comedy/ Fantasy movie that starred Tom Hanks and Daryl Hannah with John Candy and Eugene Levy.

 

It was written by Lowell Ganz and Babaloo Mandel and directed by Ron Howard.
It is about a young man who falls in love with a mermaid/mer-woman.

https://en.wikipedia.org/wiki/Tom_Hanks

 

https://en.wikipedia.org/wiki/Daryl_Hannah

 

https://en.wikipedia.org/wiki/John_Candy

 

https://en.wikipedia.org/wiki/Eugene_Levy

 

https://en.wikipedia.org/wiki/Lowell_Ganz

 

https://en.wikipedia.org/wiki/Babaloo_Mandel