Sea Hearts is a 2012 novel by Margo Lanagan. The novel is a young adult work of speculative fiction set on the fictional Rollrock Island. It explores a world in which witches have replaced all of the island's human women with selkies who are unfailingly obedient to their husbands.
In a review in Australian Book Review, Maya Linden wrote that the novel did not leave a lasting impact on the reader and that it "doesn't turn out to be quite the incomparable offering it promises". A more positive review in the Newtown Review of Books described the book as a "finely wrought, disturbing novel" that "raises unsettling questions about male desire".