Antube is an official Maxis creature present in the final game. Their hind legs are attached to their tail, rather than the bulk of their body. The evolutionary purpose for this is unknown.
Antubes are as social as they are combative. Unfortunately, they are not very good at either one. They are pretty good at charging, and they will daze an enemy for a while. Unfortunately, their bite is weak, so after stunning their foe, they will often run back to their nest.
They have been heard singing delightful tunes to each other, though they often trip up when attempting to dance to those tunes.