Bogswallow

The Bogswallow is described as a sort of "primeval" creature that was discovered during the later days of the Rescue Corps' expedition.

Biology
The overall anatomy of the Bogswallow is more primitive compared to most other lifeforms on PNF-404, with features such as a chinless, toothless mouth and numerous eyelike sensory organs along the center of its upper head. Just behind the head is a ring of skin that seemingly resembles a form of Clitellum - a glandular part of the body found in Earth leeches and earthworms used in reproduction. Whether or not this part serves a similar function for the Bogswallow is unclear, given the few sightings documented. It moves through the damp mud and water on a set of small fins just pass the head, with its body streamlined and smooth.

The skeletal structure of the Bogswallow is also described as primeval by its studies, its bones being cartilaginous like that of a shark, in contrast with most other vertebrates.

Behavior
Bogswallows spent much of their lives underground, living within swamps and marshes of PNF-404. With its sensory organs, it can detect minute movements and vibrations of potential prey and predators both within shallow water and nearby land mass. This is used often during ambush hunting, which the Bogswallow will wait for unsuspecting prey to wander in close. Once a suitable prey item is within reach, it'll lunge out of the ground and inhale its prey into its awaiting mouth.