The Leviathan is a giant Atlantean artifact that was left near the underwater entrance to Atlantis so that it could protect the city from intruders. Being longer than a submarine, the Leviathan is a mechanical monstrosity that closely resembles a lobster. It is a Character of the Dream World.
Nearly 8,000 years later, The Leviathan spots Marina (Mermaid) and Flounder swimming about in it's Territory. He immediately attacks Flounder and begins a chase going through the Tunnel to the Entrance to Atlantis. Unfortunately, Marina manages to outwit the Creature and the Leviathan sleeps while guarding Atlantis.
- The Leviathan resembles a lobster, much like the other Atlantean vehicles resemble sea creatures.
- The creature is one of the three Biblical monsters, the others being the Ziz of the sky, and the Behemoth of the earth, with the Leviathan being of the sea.
- Leviathan shares the Same Name
- The Leviathan may also be similar to a Eurypterid also known as a Sea Scorpion, an extinct group of arthropods related to arachnids which include the largest known arthropods that ever lived.
- Future Leviathan is a Counterpart of the Creature.