Allen: I didn't even like you when I first met you.
Walter Kornbluth: Nobody likes me when they first meet me.
Walter Kornbluth: There is a mermaid in New York City.
Dr Zidell: Oh... oh... sure... sure... y-you mean this... this... this "naked girl"? How come she's got legs?
Walter Kornbluth: She has legs out of the water, she has fins in the water. You taught me that Dr. Zidell, don't you remember? You taught me all the legends.
Freddie: People fall in love every day, huh? Is that what you said?
Freddie: Yeah? Well, that's a crock. It doesn't work that way. Look, do you realise how happy you were with her? That is, of course, when you weren't driving yourself crazy. Every day? Come on. Some people will never be that happy. I'LL never be that happy. What am I talking to you for? You don't know anything.
Trivia: Darryl Hannah had to wear a specially designed synthetic hair wig for the underwater shots. Notice that her wavy hair stays wavy underwater; real wavy hair goes straight underwater.