Ogopogo
Ogopogo is a Canadian Lake Monster. It has not been seen all that often (at least not reliably). It even has its ownstatue on the beach, and a man who has swum the entire length on the Okanagan Lake has supposedly seen man ogopogo on his trip.
Ogopogo is a harmless creature with a snake-like body and goat-like head. He is very big, about 15-20 ft. long, but the lake is unusually deep for a lake.
Althought he is harmless, Ogopogo has drowned a couple of horses back in the 1800s. He was noticed by the local natives who called him n'haaitk. They left a bunch of small animalsacrifices by the lake, next to his supposed lair, a bunch of submarine caves.