Solway Firth Worm
According to legend a sea dwelling worm devoured fish stocks that the local people depended on. Not satisfied with seafood, it crawled ashore to eat farm animals and humans. People from the villages along the shore built a huge palisade of sharpened stakes and erected it at low tide. When the worm came in with the high tide it impaled itself on the spikes. Its roaring and death throes lasted for three days. Sea birds ate its carcass.
Taken from an article by Richard Freeman.