Its there but quite rushed. It focused on Brendon Gleeson's guilt for it more the act itself. Brings a lot of 21st century expectations with it, particularly it being kept secret by all the survivors - in reality the main backlash from it was the captain surviving while the cousin in is care was killed after drawing…

In the book the whale doesn't stalk the survivors beyond the initial encounter. They later have a run in with some orcas and the fear of being stalked stems from that.