Su Anasy, the 'water mother', is the female genius of rivers, lakes and ponds in Tatar folk belief, one of the water-people who inhabit the world beneath the surface. She is seen at dusk sitting on a bathing-stage or a stone in midstream, combing her unbound hair with a golden comb, and it is dangerous to disturb her or to swim at the hours that belong to her. In the celebrated poem of Ğabdulla Tuqay a boy steals her golden comb while she bathes; that night a dripping figure knocks at the family's door demanding its return, and peace comes only when the mother throws the comb back into the water. Ethnographers group her with the su iyäse, the master of the water, as the paired female and male powers of a single spirit-household of the deep.