I just saw the BBC Planet Earth episode called Ocean Deep, which includes remarkable footage of nautilus, dumbo octopus, Vampiroteuthis infernalis and schooling squid hunting smaller fish and being hunted by dolphins. This would be entertaining for anyone (especially anyone reading TONMO), and the series presents biological, geographical and ecological information without feeling 'educational' or 'good for you.' The series is super-high budget, and David Attenborough narrates with his very calmly excited voice. I'll look at the episode on reefs and report back. I think that one has cuttles.