According to an entry in the Clan Cameron Archives, Loch Arkaig, west of the Great Glen, has a "lake-horse" that in the past was seen by a deer stalker and his children.

BBC: Monsters Inc: Scottish lochs and their creatures

The deer is thought to have been killed by a licensed stalker.

BBC: Emperor

For professional stalker Simon it is another working day as he unloads three deer.

BBC: Why huge Devon stag Emperor was killed