Thanator

The Thanator (Na'vi name: Palulukan) is a creature that lives on Pandora.Even the Na'vi, who are renowned for their courage, are shaken by the approach of the creature

Anatomy
Its musculature is pronounced and impressive, providing power for protracted runs and leaps. The speed of its neck and jaw strike is swift. In addition to conventional ripping and tearing, the Thanator can also deliver a lethal blow from its armored tail. The Thanator's senses are so highly developed that, depending on atmospheric conditions, it can detect prey up to thirteen kilometers away.

The Thanator has ten sensory quills that sprout from sections of armor plating that encircle the rear of its skull. The function of the quills is still a mystery, but it has been hypothesized that they may be tied to an internal mechanism of prey location. The quills also flare up and produce a more menacing appearance.

It also has an armored neck and back, a massive distensible jaw, and twenty-three centimeter long sharp teeth. The Thanator has burnished black skin. Its ten external sensory quills are colored bright red and yellow. The upper lip folds back for maximum tooth extension. The Na'vi, who are around 9 to 10 feet (3 metres) tall, could ride on the back of one of these beasts, making them approximately 20 feet (6 metres) long.

 HUNTING 

The Thanator appears to hunt alone, and normally does not stray outside of its territory, which is believed to be roughly 300 square kilometers. It appears to hunt mainly at night, although seems to make an exception if hungry enough.