@natgeo: What would a diver really face inside the ocean’s largest toothed predator? Whalefall's director and co-screenwriter, Brian Duffield, and author and co-screenwriter, Daniel Kraus, sat down with whale biologist Shane Gero, National Geographic Explorer and Field Biology Lead of Project CETI to unpack the real biology behind this larger-than-life story. Watch #Whalefall, only in theaters, and stream these National Geographic shows and more on @Disney+.