SCP-610-A

Description
The first notable feature of this creature is its sheer size. Burrowed deep within the cave of a volcanic archipelago, the massive 610 entity lies in wait utilizing vocalizations of human screams to lure prey into its gargantuan mouth. Blood drips from the roof of its mouth, likely due to lacerations caused by the tooth-like appendages which emerge from its flesh. It has a distinct metallic stench which can be sensed from a good distance. A pair of what is assumed to be some sort of eyeballs sits in the back of the mouth, emitting an eerie yellow glow. A pool of blood and saliva sits in the bottom of the mouth, bubbling constantly. A flap of skin on the right side of the mouth opens up to reveal a small room in which the symbiotic partner of the entity lives.

One very crucial thing to be noted is the rich presence of humanoid 610 instances within the creature's mouth area. These individual creatures have shown incredible hostility towards all human live and will stop at nothing to infect and kill. Sustenance is obtained by feeding off of the parent entity's massive surplus of flesh.

Behavior
This entity is incredibly hostile to almost all forms of life, with the exception of other 610 instances and Jesser. It is an apex creature, with no natural predators. All biological matter is able to be broken down into sustenance for the creature, especially flesh and bone. Upon successful luring of human prey, it will whip out massive tentacle-like appendages and grasp the unsuspecting victim with intense force. This will crush any bones underneath the contact area, likely causing internal lacerations. Following this, the appendages will fling the prey around the inside of the mouth. The giant teeth will shred the prey into a fleshy, bony paste, after which the now amorphous blob of what once was a human is then slowly pulled into the throat of the beast.

Upon entering the stomach of the 610, the digestive fluid will break down all organic matter into "nutrients," forming all calcium collected from the bone into new teeth/repairing broken ones. The meat paste is digested and subsequently infected with the flesh disease, which is finally spread throughout the entity to increase its overall presence.

The following effect is only achievable with human prey, though other animals can be consumed by the entity. During the pulverization stage, a separate tentacle will violently rip the head from the human prey, slowly peeling off any skin, flesh, or hair that has not already been shredded by the teeth. The skull, with the brain still inside, will be thrown down the throat. It will be straightpiped into the conversion organ; by anomalous means, the full skull is then absorbed into the creature and, in a random location, will emerge from the flesh walls. The entity will then anchor micro-tendrils into the brain stem, taking full control over the brain and reviving it. Unfortunately, this means victims will regain their full consciousness and feel every single bit of pain the body experienced during the eating process for all eternity. They can only scream, and not by choice.

Origin
It is currently unknown how this specific entity showed up on the moon, however it is highly suspected that it had something to do with a massive outbreak of SCP-610 back on Earth that had preceded the events described throughout the rest of the lore.