Zehoberei

The Zehoberei are a green-skinned alien race.

History
The Zehoberei were a race that was partially obliterated by Thanos. Gamora, one of the known survivors, was taken in as his daughter and trained as his assassin.

Characteristic Traits
The Zehoberei are a humanoid race, distinguishable from humans for four biological traits of note. The first is their light green skin pigments.

The second is that their facial bone structure is somewhat different than humans.

The third is their skin tissue, which is much more resistant to physical harm. While weaker than certain species, such as Asgardians, the Zehoberei's skin is much more durable than a human's skin. The increased tissue density also contributes somewhat to their physical strength.

The fourth major difference between Zehoberei and humans is the presence of a second liver, which allows Zehoberei to enjoy a larger number of alcoholic beverages than other races.

Trivia

 * In the comics, the Zen-Whoberi is a race that was completely wiped out by Adam Warlock, one of Thanos' greatest enemies and Gamora's recurring love interest.
 * Gamora has distinctive markings on her forehead and cheeks. This may be a result of her cybernetic augmentation, or it may be a trait shared by other members of her race.