In Turkic mythology, Su Iyesi (Tatar: Су Иясе or Su İyäse; Chuvash: Шыв Ийӗ; Sakha: Уу Иччи; literally "water master") is a water spirit.
It is a disembodied, incorporeal, intangible entity, but can turn into a male as well as a female creature who is the daughter of Yer Tanrı.
[1] When angered, it breaks dams, washes away water mills,[2] and drowns people and animals.
It is in Tatar[3] fairy tales the same creature as the Su Anası ("water mother").
She is said to appear as a naked young woman with a fairy-like face and yellow and long hair, usually covered in black fish scales.
Its name in Hungarian culture is Víz Anya and in Mongolian belief is Ус Ээж (Buryat: Уһан Эхэ; Oirat: Усн Эк).
He appears as an old man with a frog-like face, greenish beard, with his body covered in algae and muck.