Crystal Wollywog

The Crystal Wollywog is an extinct species of Wollywog that once existed on PNF-404.

Description
Although it is referred to as the Crystal Wollywog, many fossils of the animal don't show any crystalline properties. Its underbelly is actually a hardened carapace, presumably an evolved enhancement to the typical fighting method Wollywogs use.

Scientists suggest that the Wollywog became extinct due to this evolved underbelly being too heavy, making jumping more difficult.