These are legendary sea monsters that are said to be of enormous size that lived of the coasts of Norway and Iceland. The creature was known as to be very terrifying and would attack ships by wrapping its arms around the hull and capsize it. The crew would perish by either drowning or being eaten. One of the earlier accounts of a kraken was by Erik Pontoppidan in 1752 who described the sea creature as the size of a floating island ,he said it was not the creature itself who was dangerous but the whirlpool it created when it descended back into the sea. Since the late 18th century kraken have been described in a number of ways, in earlier times the creatures were said to be more crab like but later descriptions refer to them as more octopus like.
Over the years the kraken has been the subject of many people’s work, including the book ‘The Kraken Wakes’ by John Wyndham and the well known poem (more of a sonnet)
The Kraken by Alfred Tenennyson
Below the thunders of the upper deep;
Far far beneath in the abysmal sea,
His ancient, dreamless, uninvaded sleep
The Kraken sleepeth: faintest sunlights flee
About his shadowy sides; above him swell
Huge sponges of millennial growth and height;
And far away into the sickly light,
From many a wondrous grot and secret cell
Unnumber’d and enormous polypi
Winnow with giant arms the slumbering green.
There hath he lain for ages, and will lie
Battening upon huge seaworms in his sleep,
Until the latter fire shall heat the deep;
Then once by man and angels to be seen,
In roaring he shall rise and on the surface die.
And in more recent times the kraken has even has been the subject of computer games.
It is not sure whether the kraken really does or did exist, and most believe what people was describing were either giant squid (these were proven to exist in 1857) or a giant octopus. Some traits of the kraken resemble the traits of volcanic activity under the sea, which include sudden dangerous currents and bubbles of water.