Scooby-Doo! Where Are You? #46
When Shaggy and Scooby dig up a mysterious artifact on the beach, they take it to the local college, where the head of the Marine Archaeology Department claims to have recovered hundreds of similar artifacts - evidence that the lost civilization of Atlantis was real! So when some creatures calling themselves Atlanteans show up to cause trouble, the whole gang has to figure out what's up.