Splash (1984) Allen Bauer was rescued from drowning as a young boy by a young mermaid. Years later he once again manages to fall into the sea, & is rescued once more by the mermaid (Allen isn't sure what he's seen & what he's imagined). The mermaid decides to search for Allen in New York, sprouting legs when her tail dries. On finding Allen, they fall in love, but she has a secret, which will no longer be a secret if she gets her legs wet..
3 MEN AND A BABY: Directed by Leonard Nimoy. With Tom Selleck, Steve Guttenberg, Ted Danson, Nancy Travis. Three bachelors find themselves forced to take care of a baby left by one of the guys' girlfriends.