Jan 24, 2019
Muirdris, also known as Sínach, is a female sea monster from Irish folklore. Said to have haunted Dundrum Bay in County Down, she is most often depicted as a type of sea serpent or dragon, though there are varying descriptions ranging from a water horse to a jellyfish-like invertebrate.
Muirdris attacked Fergus mac Léti, the legendary king of Ulster, leaving his face disfigured. His servants hid all mirrors from him, until seven years after the encounter, a serving girl revealed the truth to the king. He returned to Dundrum Bay and fought with Muirdris for two days, turning the water red with blood. Finally, Fergus killed the beast before dying of exhaustion.
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