"In 1965, a young woman lived in isolation with a male dolphin in the name of science. It got weird." http://news.nationalpost.com/2014/06/06/in-1965-a-young-woman-lived-in-isolation-with-a-male-dolphin-in-the-name-of-science-it-got-weird/ …
@notjessewalker Not specifically a porn book but does have human/dolphin erotic desire: http://syntheticsean.wordpress.com/2013/01/16/wordy-wednesday-ishmael-in-love-by-robert-silverberg/ …