Dolphins are crafty. They seem to have this amazing sense of when someone is trying to take a picture of them. When they sense this, they stop whatever it is they are doing (playing tag, body surfing) and stay motionless until the camera has been put away.
In the war between Dolphins and Humans, the elders from the red planet came down and where enslaved by claus. Back then, it was just a prophecy, but now, in the future, the past has already occured.