Vortian

The Vortians  are a race of intelligent goat-like humanoids from the Invader Zim Universe. Native to the planet Vort, they are brilliant scientists, and designed weapons for their former allies, the Irken Empire, until the latter race cut the alliance short and enslaved the Vortians.

History
In the past, the Vortians were allies of the Irken Empire, and designed much of their ships and weaponry. However, when the Irkens' then-current leader, the Almighty Tallest Miyuki, met her untimely death while visiting a Vortian research facility, the alliance was terminated between the two races. Recently conquered by Invader Larb, Vort is now Irk's top military research prison.

Biology
The Vortians are humanoid in structure, and are around the same height and of the same proportions as the average Irken (about five feet). They have gray skin, and possess goat-like characteristics such as hooves, and a pair of large, flexible horns atop their heads. They also have two small eyes in the typical place, but lack ears or a nose.