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Message: <blockquote data-quote="ColonelHardisson" data-source="post: 570343" data-attributes="member: 363">Well, it was 200 million years in the future. The bioluminescence could well be as energy consuming as the camouflage ability of the octopus by that time, depending on how evolution goes. 200 million years is a long time. The pack hunting activity of modern sharks is kind of rudimentary, but over the course of 200 million years, and in the face of mass extinctions and climatic changes, this could evolve into more intelligent planning - especially if you consider that the premise is that most other fish died out. For a long time, the sharks would have had to patrol empty oceans; working together could be a distinct advantage in finding food. Being able to identify one's own pack would also be valuable; other packs would be more easily identified as food.I think what's important to keep in mind is that the show is a companion piece to the book. The book, if it's anything like Dixon's wonderful After Man and The New Dinosaurs, will answer many of the questions raised by the show. Trying to depict an entire ecosystem in a half hour to 45 minutes is tough to do (remember, they tried to show 3 different ages in two hours time).</blockquote>