Lough Nahooin is a small mountain lake, located in Leagaun - a 7 minute drive from Claddaghduff Church. The creature in Nahooin Lough was first sighted in 1948 by two local men. Another sighting of what has been described as a large "eel like" creature was made in 1968. During the Loch Ness Investigation Bureau investigation (1969) of the Lough Fadda sighting a local farmer reported having recently seen the Nahioon Lough creature on land.