I thought of the possibility that you had the chapter written already and the whale was a mere coincidence but I thought that was unlikely enough that I could proceed on the assumption that it was not the case.
I wouldn't say the coincidence was unlikely. The honeymoon location was carried over from canon and in such a setting killer whales are the obvious choice of food. They are more or less carnivorous dolphins. You cannot get too much higher on the "similar to humans and eat a lot of meat" criteria.
But you still have cause to be flattered. Great minds think alike and all that!
In the vein of the Harry Potter and the Methods of Rationality discussion threads this is the place to discuss anything relating to Alicorn's Twilight fanfic Luminosity. The fanfic is also archived on Alicorn's own website <strike>(warning: white text on black background)</strike>.
Previous discussion is hidden so deeply within the first Methods of Rationality thread that it's difficult to find even if you already know it exists.
Similar to how Eliezer's fanfic popularizes material from his sequences Alicorn is using the insights from her Luminosity sequence.
Spoilers for the fanfic itself as well as the original novels need and should not be hidden, but spoiler protection still applies for any other works of fiction, except for Harry Potter and the Methods of Rationality chapters more than a week old so we can freely discuss similarities and differences.
EDIT: Post-ginormous-spoiler discussion should go to the second thread. (If you have any doubt on whether you have reached the spoiler in question you have not.)