Aughisky
The Aughisky are from Scotland. They do not gallop along the shore unlike some other water horses. They cannot be permanently tamed but can be tamed temporarily if a halter is placed on them without them seeing their lake. If they see their lake, they will charge into the water and rip up their former owner. They eat cattle and are sighted most in November when they come ashore to graze. Although they are mostly benign you shouldn’t go in their lake after dark.
Citations:
Bane, Theresa. Encyclopedia of Fairies in World Folklore and Mythology. United States, McFarland, Incorporated, Publishers, 2013.