Abstract: Mermaids and Other Undines: Medieval Representations of Scandinavian Aquatic Figures. Without claiming to be exhaustive, this article compares the different aquatic figures of Scandinavian imagination, and the representations relating to Scandinavia, taking into account their cosmic aspect. This paper highlights the close connection of these creatures with time, weather and music, and the evolution of the representation of sea creatures that embody geography and climate, real or fantasized. These representations evolve, especially because of the important Christianization process that they undergo. With Christianization, these sea creatures tend towards demonization, and they’re influenced by Occidental representations, especially with those of the sirens of the Nibelungenlied. Scandinavian aquatic figures represent different dangers according to the type of water in which they live: salty, soft or marshy. According to their gender, the marine creatures which embody different risks are put in perspective in a comparative approach that links the Eddas and the stories reported by Xavier Marmier, especially Danish and Swedish. Thanks to the privileged bond these figures, emerging from the Edda, sagas and ballads, maintain with speech and music, their evolutions and their representations survive in the collective imagination related to Scandinavia.

Keywords: Middle Age, Scandinavian literature, hybrid representations, mermaid, imaginary of the sea.