|This page focuses on the huge sea monster.|
For the Camelot knight that goes by "The Leviathan", see Lancelot.
The Leviathan is a character featured in the extended universe of ABC's Once Upon a Time. It débuts, with its only appearance, in the graphic fiction novel, Out of the Past.
The Leviathan is based on the sea monster of the same name from the Tanakh.
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Before First Curse