This is a rather harmless old black and white comedy-fantasy. I had never heard of it before this opportunity came along to watch it, and the only name I recognized was jolly Margaret Rutherford, a familiar and very busy character actress for decades. Glynis Johns carries the film with her pretty face, blond hair and vibrant personality. The fantasy aspect is that she plays a mermaid.
It is not a classic to join ones on my shelf for multiple viewings, but it is entertaining enough to be worth the time. Miranda is the mermaid that a doctor brings home from a fishing trip, whereupon every man... read the rest.