Jörmungandr is also reffered to as the Migard Serpent or the World Serpent. There are many recorded Norse works regarding Jörmungandr. The most popular is the Prose Edda, which contains different Norse myths.
Jörmungandr, also known as the World or Midgard Serpent, is a sea monster that comes from Norse mythology. Jörmungandr is the child of the giantess Angrboda and Loki. In Norse mythology, Jörmungandr appears to Thor while he is fishing. Thor and the giant Hymir had gone fishing, and the giant refused to give Thor any bait. Thore then cut off the head of Hymir's largest ox for bait. The two began fishing competitevly and Thor kept rowing out further, despite warnings from Hymir. Thor was able to catch Jörmungandr, and the two battled. Thor was able to defeat the monster and Hymir cut the line to let the monster sink. Jörmungandr, however will come back for a final battle with Thor. While Thor is able to kill the beat, he too dies from poison that Jörmungandr produces. This tale became a popular motif for Norse pagan art. The picture above is an example of this.