Mr. Peabody and the Mermaid is a 1948 American romantic fantasy film directed by Irving Pichel starring William Powell and Ann Blyth in the title roles. The film was based on the 1945 novel Peabody's Mermaid by Guy and Constance Jones. Sequences were shot at the Weeki Wachee Springs in Florida; Blyth's swimming doubles were Nancy Tribble and Mary Ann Ziegler.

Plot

Much of the story is shown in flashback as Arthur Peabody tells a skeptical doctor about the source of his malaise.