I'm trying to identify a novel that I only partially read as a teenager in the early 1980's. At the time I abandoned it as being silly and verging on cheap pulp fiction. I now suspect it was inspired by the real life scientist John C. Lilly and events around his experiments with teaching dolphins to speak, in particular an experiment with an actual dolphin called Peter. Lily was a deeply flawed scientist but was one of the first to recognise the emotional complexity that dolphins are capable of. So, I'm curious to re-read it.
What I remember of the story is:
A woman living alone in a specially flooded house with a dolphin. She is talking with the dolphin and has a sexual encounter with it. (This has close parallels to the real life experiment with Peter the dolphin).
A male character is concerned that the moon is shrinking or moving away from the orbit of the earth. (This may parallel or be a metaphor for John C Lilly's interest in developing an approach to communicating with extraterrestrials should the human race ever encounter them).
I recall a scene early in the novel in which two characters visit a car race.
I also recall a scene in which two characters are playing a video game in a hotel lobby or possibly waiting area in an airport and a child starts to imitate the sounds of the video game.
Not much to go on as admittedly I never finished the book. There was a very 1960's or 1970's sort of atmosphere to the book. I recall the cover being blue and featuring an image of a dolphin , a naked woman, and stars.
It is not Dolphin Island by Arthur C. Clark, and I don't believe it is Day of the Dolphin (translated by Helen Weaver from the French source novel). I saw this film many times as a child and though I have not read that book as far as I read in this unidentified novel, there was no similarity in terms of plot. All these stories were inspired by real life scientist John C. Lilly. So, if anyone can identify it or at least suggest a likely candidate novel I would appreciate it.