Hunter

The Hunters/Mgalekgolo (Ophis congregatio, meaning "serpent union") are a unique gestalt of smaller creatures known as Lekgolo, which are tiny, orange, worm-like creatures that group together to geometrically increase their intelligence, strength, and maneuverability. Humans call the Mgalekgolo Hunters.

Pictures
http://images4.wikia.nocookie.net/halo/images/thumb/7/79/Cov_Hunter.jpg/300px-Cov_Hunter.jpg