Sarlacc

The sarlacc was a semi-sentient, plant-like, omnivorous creature found on several planets across the galaxy. Not much was known about this creature, but it was unique in terms of galactic species. It lived to be tens of thousands of years old, and reproduced by spores. One particular specimen of sarlacc was located in the Great Pit of Carkoon on Tatooine. It tortured the famous bounty hunter Boba Fett, who eventually managed to escape. While Jabba the Hutt has claimed it as a pet, it arrived on Tatooine of its own accord. 

A sarlacc could be found on Felucia, and was the location where Shaak Ti was slain by Darth Vader's secret apprentice, Galen Marek. Another sarlacc was known to dwell in the pit on the planet Aargonar's moon Aargonar 3. Besides the famous one, yet another sarlacc dwelled on Tatooine right next to some Ancient Ruins. It attempted to devour Darth Tyranus while he was dueling Anakin Skywalker, but the Count used an exertion of the Force to escape and then fled from battle.