Gúta

The Gúta, pronounced "Gueta", is a gigantic troll-like species found on the planet Reach. It is hostile to both humans and Covenant troops.

Description
The Gúta is the largest terrestrial lifeform discovered on Reach. Severe aggression is rare, outside rutting males or females with young. Even so, they are extremely dangerous animals. It is incredibly durable, requiring 3-4 shotgun blasts and an equal amount of melees to kill it on Normal. The Gúta becomes even more powerful on Heroic and Legendary.

Trivia

 * The Gúta bears a passing resemblance to the cut Blind Wolf from pre-Xbox builds of Halo: Combat Evolved. It also greatly resembles the Deathclaw from the Fallout series and slightly resembles the Rancor of the Star Wars universe.
 * The Gúta is seemingly named after the Guta, a fearsome demon from Hungarian mythology, as many of Reach's early settlers were of Hungarian descent.
 * A Gúta's roar can push a Spartan back fairly hard despite the enormous weight of a Spartan.
 * On a players career stats at Bungie.net, the Gúta is listed as "mule" and instead of its rank, it simply says "no hugging".
 * Unlike the Moa, if you kill the Gúta with campaign scoring on, you will get points for it.
 * The Gúta was given the nickname "Mule" by Bungie employees.
 * Several ideas were formed around the Gúta, but were ultimately cut from the game. Among these ideas were Gúta being used as battle-mounts by Elites and Grunts, Gúta that were equipped with mounted weapons, and the ability for the player to "hijack" the Gúta and plant a grenade in its mouth.
 * The Gúta was originally set to be in several other Campaign missions in addition to Nightfall.