Rusalka is a term used in Slavic mythology that refers to female aquatic spirits. In Russian folklore, they are often depicted as beautiful maidens who lure sailors to their deaths. In other cultures, they are believed to be benevolent creatures who help fishermen and bring good luck to those who treat them with respect. There are several synonyms for rusalka, including vodyanoy, which refers to a male water spirit, and naiad, which is a water nymph in Greek mythology. Other terms include mermaid, siren, and selkie, though these have slightly different connotations and origins. Regardless of the name used, these water spirits continue to capture the imagination and inspire stories around the world.