This legendary sea monster is said to dwell off the coast of Norway and Greenland. One of the few encounters with the Kraken dated back in the 14th century. It has been described as a giant octopus or squid and estimated to be up to 50ft in length. The largest colossal squid was 33ft and weighed 1.091 lb. Their tentacles are lined with sharp hooks and teeth that could easily hook onto a small wooden ship.