The initial species of the Annoo-dat were the Annoo-dat Prime. These reptilian combatants, characterized by having four eyes, devastated and subsequently deserted their original planet, Annoo. Following this, they seized control of the adjacent world of Gelefil, which was subsequently renamed Annoo. They possessed extraordinary strength, speed, and reaction times. In addition to their reptilian characteristics, they could perceive infrared light and analyze the air through a sense akin to that of snakes. On infrequent occasions, Annoo-dat Prime individuals were born with a second set of fully functional arms, a characteristic inherited from an earlier evolutionary stage. Typically standing at a height of eight feet, they also possessed sizable tails.
A significant Annoo-dat individual was Ashaar Khorda, a terrorist who endeavored to obliterate Coruscant, the core system of the Galactic Republic. Jango Fett and Zam Wesell, who were bounty hunters, thwarted Khorda's plans and killed him.