For the disgraced knight known as the Leviathan, see here.Leviathans are creatures featured on ABC's Once Upon a Time.
In the Leviathan Shoals, located near the Southern Isles of Arendelle, a Leviathan attacked Killian Jones's ship. However, Killian and his crew managed to destroy the monster. A former Knight of the Round Table named Lancelot eventually became known as the Leviathan, as he was known for attacking like one, and killing enemies before they even see him coming.
- Leviathan of the Leviathan Shoals (deceased)
- Leviathans are based on the legendary sea monster from the story 'The Bible'.
- Bk 3: "Out Of The Past" - Dead In The Water