According to Scandinavian mythology, the Kraken is a legendary sea monster of giant size. It is said to dwell off the coasts of Norway and Greenland. The Kraken is usually described as a giant squid or octopus-like creature but it has also been described as crab-like. There are various tales of the Kraken attacking and destroying ships. It is also capable of making giant whirlpools which could bring down ships. It is believed that the myth of the Kraken could have originated from giant squids which could grow up to 18 meters long and would be rarely seen by humans.