Rockgrub (Below Zero)

The Rockgrub is a very small, passive fauna species. Despite superficially resembling an invertebrate the PDA states that it is a possible relative of the Sand Shark, meaning it must be a small vertebrate.

Appearance
The Rockgrub is tiny in size, it's translucent body glows a bright bioluminescent green color. It lights up a small spherical area around itself. It has a slim, round, segmented body with two swimming fins on either side, and a larger flipper serving as the tail.

The Rockgrub has five appendages on each side of its body, and a circular maw containing many small teeth.

Behavior
The Rockgrub swims rather quickly within its vicinity, seemingly scavenging whatever it could find. They are most visible in darker areas such as caves.