The wild grillik was a large reptilian creature native to the jungle-moon of Nallastia. Covered in scales, the reptile had six muscular legs and a long, lean body. Its jaws encased three rows of very sharp teeth.
Grilliks were generally peaceful, but they could be extremely territorial, especially toward those who wandered too close to their nests.
The Margravine Quenelle issued sentences of death to poachers of Nallastian wildlife.
In 23 BBY, in the grassy foothills of Nallastia's Mount Octan, an 18-year-old Jedi Padawan, Anakin Skywalker, crash-landed a CloakShape fighter that he'd borrowed from Senator Rodd while on a mission to Fondor.
On his first night on Nallastia, near the jungle-fringes of his campsite, Skywalker came face to face with a wild grillik, which he battled and drove back into the dense jungle growth, relatively unharmed but with the admonition, "Let that be a lesson to you."