When the sun was still dark and the animals were not born yet, the earth emerged from the sea. Then all of live was created with a good side and a bad side. Of land, and of sea. Then humans and a god were created at the end
I think that this story symbolizes the good and bad of the world and why bad things happen to good people.
This story might really represent the light and dark of heaven and hell, and other
Darkness in this story represents the sea and all of the slimy, dark creature made to balance out the good and bad creatures.
Light in this story symbolizes the creatures made on earth, and their partner the humans and god. They counterbalance the darkness of the sea creatures and filthy land creatures.