"A common term for evil serpentine dragons in regions of the British Isles that were settled by Vikings a millennium ago. Worms inhabit foul, dank, places, such as boggy marshes, fetid lakes, and wells. They prefer hidden lairs near swamp lakes that connect with the sea at high tide, thus allowing these monsters to pass from one environment to the other. Their heads are like those of dragons or horses, with huge bulging eyes, great fangs, and often horns."

~Source: Literature- Zell Ravenheart, Oberon, "A Wizards Bestiary/by Oberon Zell-Ravenheart and Ash "LeopardDancer" DeKirk" New Page Books, 2007