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Along the Amazon River, there are many legends about the pink Amazon River dolphin. For the Indigenous Peoples who live along the river, the pink river dolphin is sacred. In fact, they believe that killing one can bring bad luck.10
In Amazonian tales, the river dolphin is viewed as a shapeshifter who transforms from dolphin to human and back. He is known to turn into an elegantly dressed man who comes to shore, charms women, and gets them pregnant.
In other stories, the pink river dolphin charms children and brings them to an enchanted world under the water, from which they never return.
https://www.uniguide.com/dolphin-meaning-symbolism-spirit-animal-guide