I also looked up Norse mythological creatures:

Jörmungandr is one of Loki's creations. A serpent so big (that it lives under the sea) it wraps around the world and can bite its own tail. They believed the day when he released his tail was when the world would end.

I also found out that Lynx's could/can be found in Scandinavia. 

http://mythicalarchive.com/List_Creature.php