Nemacyte

Nemacytes are small insectoid creatures that act as inhabitants inside the body of the Riftworm.

Biology
They are described as hideous human size parasites or possibly some sort of antibodies to the Riftworm itself. They possess long front limbs, short appendages, also have no eyes, digestive teeth and semi long eel-like tails.

Nemcytes only appear undernath the surface the worm's stomach emergeing directly  from openings in the ground. They also possess an acidic-based quality that these creatures leave behind after mauling victims.

Appearances

 * Gears of War 2 (2008)