Very entertaining flight of fancy, a 'what if' which made a few base suppositions and then went from there, allowing the story to develop. Very obviously fake, but entertaining to follow what might have happened had humans evolved into the oceans. Tying it into conspiracy theories was a bit dodgy, but also gave the film a good plot device about why nothing would have been heard about across the globe- "the government covered it up".
Now, if you're one of the screamers out there crying that Animal Planet dared to show a fictional documentary, what you're really saying is "I have no ability to think critically and so depend upon the television to tell me the truth, because of course, television never lies and channels shouldn't ever change their programming. Animal Planet shouldn't ever expect me to think for myself and judge whether something is fiction or reality." I recommend this 'documentary' to anyone with enough sense to know when something is a work of pure (if enjoyable) fiction.
Now, if you're one of the screamers out there crying that Animal Planet dared to show a fictional documentary, what you're really saying is "I have no ability to think critically and so depend upon the television to tell me the truth, because of course, television never lies and channels shouldn't ever change their programming. Animal Planet shouldn't ever expect me to think for myself and judge whether something is fiction or reality." I recommend this 'documentary' to anyone with enough sense to know when something is a work of pure (if enjoyable) fiction.