SOLVED. Thriller/romance involving ocean and sharks...late seventies or early eighties [s]

[Lobstergirl, au gratin]

Someone in the group already searched for it and found it....oh well!

https://www.goodreads.com/topic/show/...

[Bren fall in love with the sea.]

Well I'm glad. I never even thought to go far back on solved posts and look for it that way. It's so funny so many people were searching for it.