Jubba-Jubba

The Jubba-Jubba is a giant creature from the Hork-Bajir homeworld.

Physiology
One of several monsters created by the Arn to act as a natural guardian to keep any wandering Hork-Bajir from their settlement. The Jubba-Jubba is a prevalent monster in Hork-Bajirr mythology seeing it a fierce creature that is death personified in their stories. A Jubba-Jubba is noted to be a large creature, larger than even a Hork-Bajirr, able to use its three-fingered hands and tear a Hork-Bajir in two with ease, and bite one in half and swallow 2/3's of the whole with its huge maw.

Source

 * The Hork-Bajirr Chronicles