Cultural knowledge tells us that Guruwal [whale] “… will come back to the land to regurgitate the lore so that the lore can be complete and the land and the sea can know each other.”
Bruce Pascoe, Salt. p. 134. 2019
Science tells us that Guruwal the whale came from the sea, evolved on land into a wolf-like creature, Pakicetus, before returning to the estuaries, first as the amphibious Ambulocetus, then to the ocean to become the whales we see today.