GlobeandMail.com recently reported how a small octopus, about the size of an orange, was captured attached to a porcelain plate.  The find was in South Korea and the discovery was dated to the Goryeo Dynasty, which ruled from AD918-1392 and was famed for its porcelain.  This little octopus led to a find of over 2000 items at this site.

You never know what you are going find underwater.  Let us know what interesting things you have found underwater.