In Matthew Paris’s Chronica Majora for 1255 he tells how a wonderful sea monster was cast up by the sea on the coast of Norfolk. Intriguingly the monster was not a whale as one might think, but was larger than one! Unfortunately we don’t get any further description of what this beast might be!
During that same time the sea cast up in the districts belonging to the diocese of Norwich an immense sea monster, which was disturbed by the violent commotions of the waves and was killed, as was believed, by the blows and wounds it received. This monster was larger than a whale, but was not considered to be of the whale kind: its carcass enriched the whole adjacent country.
- Medieval Magic and Marvels: Matthew Paris and the Music of the Heavens (marklord.info)
- They Found the Sea Monster’s Lair! [Science Watch] (gawker.com)
- Who sent the sea monster to kill Perseus (wiki.answers.com)
- Beginning of Sea Monster novel online (shapechangertales.com)