Morvarc'h (Breton for "sea horse") is the name of a fabulous horse of Breton legend found in two folktales reworked in the 19th and 20th centuries. Though its name appears in older sources, it was invented or reinterpreted by Charles Guyot, who named it Morvark in his version of the legend of the city of Ys in 1926. It belongs to the "Queen of the North" Malgven, who gives it to her husband King Gradlon. Endowed with the ability to gallop on the waves, Morvarc'h is described as having a black coat and as breathing flames through its nostrils. It also appears in a Breton folktale about King Marc'h of Cornouaille. In the course of a deer hunt it is killed by its own rider's arrow, which has been turned around by the spell of Dahud, the daughter of Malgven. She then puts the ears of the horse