Fish out of water

[I]nto this queer assembly, something of a fish out of water and wholly out of his element, strode Cherry Bim, that redoubtable man.

A pitcher at bat is usually considered such a fish out of water that he is expected to foul, ground or strike out.

“The basis of this show is fish out of water,” said the executive producer, Quincy Jones, the music impresario who has never before put his name on a television series but whose work as producer of Michael Jackson's albums won him respect in Hollywood as a canny judge of public tastes.

Many stay-at-home fathers find that they are fish out of water, too.