The Zygerrians were a powerful people in the days of the Old Republic, before the Jedi Knights tore down their empire of slavery. When slavery was outlawed in Republic space, the Jedi Knights liberated countless beings from bondage, and the despicable trade the Zygerrians excelled in was pushed into the shadows of the underworld.
Zygerrians are a humanoid species, with strong, angular features. They are very strong, able to easily dominate the weak when on equal footing. They are also quite cunning at ensuring they always maintain the upper hand in any situation.