Crocopup

The Crocopup is a strange hybrid breed that appears in the film The Croods.

Appearance
The crocopup's head resembles a crocodile's more than a dogs, despite the fur. The rest of it is in favor of a dog, but beneath its fur is scales. It is typically 3-5 feet in length and anywhere between 200-300 lbs.

Behavior
Despite its aggressive demeanor, it makes a good companion and acts like any other dog would, besides the fact it will eat anything it can fit in its maw. They hunt in packs near riverbanks. Crocopups eat anything from water creatures to land creatures, as they are highly adapted to both environments. It lives for over 50 years, making a great long-lived friend. It will shed its teeth, but they will regrow however. They can survive long falls.

Source
The Croods Wiki