"In his house at R'lyeh, dead Cthulhu waits dreaming..." - English translation of Aklo verse
This article is written on a topic within the Greater Cthulhu Mythos based on information from works in the Mythos. By default, all information is to be assumed to derive from the Lovecraft Myth Cycle unless otherwise marked.
He has a cone-shaped body, a razor-fanged reptilian head rather like that of a Tyrannosaurus rex, four broad, flat, starfish-like arms with suckers, and a mane 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.