Destoroyah (Dawn of the Godzilla Universe)

Destoroyah is an Oxygen Destroyer-mutated prehistoric crustacean kaiju created by Toho and appears as a major antagonist of Godzilla: New Age of Monsters and the posthumous antagonist of The Dawn of Godzilla. He is the spawn of the Oxygen Destroyer and Godzilla's first archenemy.

Origin
Destoroyah is a colony of prehistoric crustaceans mutated by the Oxygen Destroyer.