Chatham, the Deep Terror

Forgotten to all but the Tritons, the great god-monster, Chatham, has not been seen in millennia. He is said to slumber in the dark heart of The Deep Reef, from which the evil energy of his dreams filters into the Material Plane. This energy manifests in dark tidings, violent storms, and hideous monsters. The Tritons claim that they alone have the power to prevent him from waking and wreaking havoc upon an unsuspecting world.