Glashtyn is a legendary creature from Manx folklore.
A glashan featured in an Irish folktale retelling.—Illust. Willy Pogany. Colum, Padraic (1916). King of Ireland's son
A water horse is a mythical creature, such as the Ceffyl Dŵr, Capaill Uisce, the bäckahäst and kelpie.
Water horse
Flight of King Gradlon: Morvarc'h, the magical steed of King Gradlon of Ys.