The Lagarfljótsormur, Lagarfljót worm, (or Iceland Worm Monster) is an Icelandic lake cryptid which is purported to live in Lagarfljót in Egilsstaðir. Sightings have been logged since 1345 and continue into the 21st century, and an origin of the creature is given in Jón Árnason’s collection of Icelandic folktales and legends published in 1862 and 1864.
The serpentine creature is said to live and often be sighted raising its back above the water in Lagarfljót, a freshwater, below-sea-level, glacial-fed lake. It is described as longer than a football field, or 300 feet , and has also been reported outside the water, lying coiled up or slithering into the trees. Sometimes it is said to be as long as the lake itself, 30 kilometres (19 mi). It is a “many humps” type of lake monster, rather than the simply serpentine type.
In February 2012, the Icelandic national broadcaster, RÚV, published a video thought to show the Lagarfljót Worm swimming in snow-covered icy water.
More information plus video of the alledged 2012 sighting here – http://holywells.boardhost.com/viewtopic.php?id=120