A hulking aquatic creature that ventures onto land to hunt. Most closely related to the earthen starfish, an adult can stand up to 35 feet tall. They resemble a giant spider crab with nearly 20 legs and a shell made of thick coral reef. It has no eyes, nose or ears but can taste through tiny sensors on it's many feet. Like a starfish, it's mouth is located on it's underbelly, and it uses it's many barbed feet to pull prey into it's mouth. They can camouflage very well with their surroundings, and when still resemble a large mound of rocks on the beach.
It's Name is derived from Cnidaria; the Latin classification of coral, and the mythical creature the wraith.