(sometimes spelled Zoth Ommog) is the third son of Cthulhu and a villain in The Xothic Legend Cycle (also known as The Xothic Legend Cycle: The Complete Mythos Fiction of Lin Carter) series of short horror stories by Lin Carter based on the Cthulhu Mythos of H. P. Lovecraft, primarily on Lovecraft's stories The Call of Cthulhu and Out of the Aeons.

He has a cone-shaped body, a razor-fanged reptilian head like that of a Tyrannosaurus rex, four broad, flat, starfish-like arms with suckers, and a head of tentacles. How he swims or walks on the ocean floor is unknown, but it is possible that he has a slug-like foot similar to that of the Great Race of Yith.

Zoth-Ommog was imprisoned by the Elder Gods beneath the seabed near Ponape and R'lyeh. Like his older brother Ythogtha, Zoth-Ommog is served by Father Ubb and the yuggs. Zoth-Ommog's legend is chronicled in the R'lyeh Text and the Ponape Scripture.

(The Elder Gods as punishers of the Great Old Ones (a God and Satan theme) was not a Lovecraftian invention, but was introduced into the Mythos by August Derleth and carried on by a multitude of other Mythos authors, most notably Brian Lumley and Lin Carter.)

In Leigh Blackmore's sequel "The Return of Zoth-Ommog", Zoth-Ommog re-emerges on the island of Ponape and wreaks havoc until he is destroyed by an ancient ritual.


  • The influential German Industrial music record label company called "Zoth Ommog Records" was named after Zoth-Ommog himself.