In Māori tradition a taniwha is a guardian of rivers and seas — protective of its people and dangerous to the disrespectful. Dream tradition reads it as guardianship and as the respect owed to powerful places.
When this appeared in your dream, what were you feeling?
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.