The Shape of Things to Come

The Shape of Things to Come
We have seen the amazing morphologies of the organisms that comprised the great natural experiment called the Ediacaran fauna. The unique shapes and symmetry forms of Ediacaran life are bizarre to us because we have no analogous organisms currently living on Earth. Can you hypothesize about specific environmental and ecological conditions that may have combined to give rise to the inspiring functional morphologies of the Ediacaran fauna?