In Aboriginal Australian traditions the rainbow serpent shapes the land and governs water. Dream books read it respectfully as creation, life-giving water and the power of renewal.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.