Loch Ness Monster, eh?
Nessie is probably the most famous "monster of the sea", but there are others swimming around other bodies of water throughout the world. I remember one (Champ) being talked about living in Lake Champlain, VT. Apparently, our neighbors to the North have their own monsters, too.
Canada's Lake Simcoe, some forty miles north of Toronto, supposedly holds a monster known as Igopogo (after its more famous relative Ogopogo, in Lake Okanagan, British Columbia) as well as other appellations. Residents of Beaverton, on the eastern shore, call it Beaverton Bessie, while others refer to it as Kempenfelt Kelly, after Kempenfelt Bay, which has the lake's deepest water and claims the most sightings. Sources refer vaguely to early "Indian legends" of the monster and sporadic reports of a "sea serpent" in the lake during the nineteenth century. Important sightings occurred in 1952 and 1963, and a "sonar sounding of a large animal" in 1983 was followed by a videotape in 1991 of "a large, seal-like animal." Significantly, according to John Robert Colombo in his book "Mysterious Canada," "No two descriptions of Kempenfelt Kelly coincide." Nevertheless , writer George M. Eberhart, in his book "Mysterious Creatures," attempted a portrait: Physical Description: Seal-like animal. Length, 12–70 feet. Charcoal-gray color. Dog- or horse-like face. Prominent eyes. Gaping mouth. Neck is like a stovepipe. Several dorsal fins. Fishlike tail. Behavior: Basks in the sun.