Pusalka is a water nymph, a female spirit in Slavic mythology. She is the equivalent of a mermaid. She has different names in various cultures: rusalka vila, wiła. According to most traditions, rusalki were fish-women, who lived at the bottom of rivers. In the middle of the night, they would walk out to the bank and dance in meadows. If they saw handsome men, they would fascinate them with songs and dancing, mesmerize them, then lead them away to the river floor to their death.