The great ukjaw replaced it's ancestor, the ukjaw. With the lack of other predators, the ukjaw was able to spread and fill the niches. They have become more complex with a more advanced brain, cardiovascular system, respiratory system with primitive lungs that connect to two nostroils on its forehead," like the ukrequin," and visiable eardrums. They have also evolved a more powerfull sucking ability so they don't have to rely on completly digesting the prey outside their body. Due to the size of most the great ukjaw's prey items, they have grown multiple spikes on their back to protect themselves.
The great ukjaw will roam the area looking prey and then stalk it. If there is more then one ukjaw in the area, one will walk away before chasing after the prey or they'll see who can get the prey first and the loser will leave immediately. Like it's ancestor, the great ukjaw will sprint towards the prey and bite it on the neck and keep it down on the ground as the great ukjaw injects digestive juices into the prey's spinal cord. They are known to slash and grab at the prey with their tail grasper. Once they have killed their prey, they start to beat it and tenderize it so that can more easily digest their prey. With their tail claws and nostrils, the great ukjaw's communicating system has become more complex.
They are solitary and will only meet to mate in the spring. They develop hard-shelled eggs. The parents will make a dirt nest protected by flora. At birth, the offspring look like a cross between a stumpworm sucker and an ukjaw. The mother will have the offspring follow her and feed off her kills until they are full grown.
single tail click for every creature they meet = alert of their presence
short deep blow with slow tail clicking = signal of irritation
long loud blow with fast tail clicking = warning that they are going to attack to protect themselves
whistle with any or no form of clicking = signal of comfort or pleasure