In the depths of the sea, lives the draug or the Strandvaskare. The draug is the spirit of a person who died at sea. He sails through the sea in half a boat. If a man happens to see a draug, he is in mortal danger unless he races the draug and wins. The word Strandvaskere is found in Danish, Swedish and Norwegian. It refers to a drowned person washing up on the shore.
Water spirits, among others the nix, are often presented in the shape of a devil. A water spirit would hide in the rapids and lure people into the water to drown. the brook horse was believed to be one and the same (bäckahästen).
In Scandinavian folklore, dragons are commonly known as lindworms, monstrous serpents with or without hind legs. In Sweden, Norway and Denmark, they typically live in the ocean, and here, tales of marine monsters appear to have the widest dissemination, although a famous specimen is also said to reside in the Swedish lake Storsjön. The Norwegian lake Seljordsvatnet is also famous for its claimed inhabitant, a serpent known as Selma. The coasts of Scandinavia are reportedly also haunted by the terrifying Kraken. Sea serpents, with their glowing eyes and long manes, are also prevalent in Scandinavian folklore, as well as their invisible kin the sea-whip.