Y-Pora

Y-Pora are from the Guarani people of Argentina. They attack fishermen and anyone else who travel the waters of the area. They sometimes appear in the form of a fish/human hybrid but can also appear in the form of a thick mist smelling like sulfur.

Citations:

Maberry, Jonathan. Vampire Universe: The Dark World of Supernatural Beings That Haunt Us, Hunt Us, and Hunger for Us. United States, Kensington Publishing Corporation, 2006.