Leviathan (超星神リヴァイアサン?, lit. Super Star God Leviathan) is a Chōseishin Rivaiasanmecha created by Toho that first appeared in episode 13 of the 2003 series, Super Star God GranSazer titled Attack! The Impactors.
In this form, Leviathan is meant to resemble a Whale.
When combining into the fused dragon robot Daisazer, Leviathan becomes the left arm & the tail.