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. Another sarlacc was known to dwell in the pit on the planet Aargonar's moon Aargonar 3. Another Sarlacc located in Tatooine right next to some Ancient Ruins tried to eat Darth Tyranus while he was battling Anakin Skywalker, but used Force push to escape and he fled from battle.
The lifespan of a sarlacc had been estimated to measure 20,000 to 50,000 years. Younger members of the species could move under the sands rapidly and catch their prey much faster, while older ones remained immobile, waiting for prey to stumble into their clutches.Females generally grew much larger than males, to the point that breeding required that the male attach itself to the female, being entirely dependent on their much larger companion. Adults generally had little to fear, as only the greater krayt dragon of Tatooine was known to prey upon them.
One of the known specimens of the species resided in the Great Pit of Carkoon, beneath the sands of the Dune Sea on the remote planet of Tatooine. Most sarlacci preferred damp environments, but they could live nearly anywhere including the desert sands of Tatooine.
The largest known sarlacc in galactic history resided on the planet Felucia within the Ancient Abyss. The Jedi Master Shaak Ti was able to tame this beast and it assisted her in her duel with Starkiller. However, she lost the duel and was swallowed by the beast. It possessed massive tendrils and teeth that spread out over an area of the Abyss that was kilometers across. This sarlacc was capable even of using its tentacles to drag great beasts like rancors into its maw or to crush attackers. In 2 BBY, it was restrained by the Galactic Empire in order to hunt down the remaining Felucians, although it was later freed by a redeemed Starkiller.
Xenobiologists were unsure as to whether the sarlacc was animal or plant, as it possessed the characteristics of both kingdoms, but most scientists preferred the theory that the sarlacc was a giant plant organism. Data taken from Boba Fett's helmet suggested that it was more like a plant.
The sarlacc was a large, omnivorous arthropod with long tentacles that rimmed its mouth. They reproduced by spores, known as "sarlacci," that traveled through space until they found another suitable planet to inhabit. After implanting itself into the ground, the sarlacci grew downward like a plant, forming a pit. The mouth and tentacles were the most visible parts of the sarlacc. The rest of the sarlacc's massive anatomical features were buried up to one hundred meters deep in the ground. This guaranteed protection of the sarlacc's vital organs made it invulnerable to most forms of serious damage. The teeth of the sarlacc surrounded its beak-like tongue and plant-like tentacles in tiers. Its teeth were also slightly slanted inward ensuring its prey would remain captured. While its lightning-fast tentacles are used to snatch up its prey, they were not its primary means of capturing a meal. The sarlacc discharged odors and scents that lured herbivores and scavengers close enough for it to use its tentacles. Sarlaccs had a very odd body shape. The sarlacc's mouth was the only part of the body visible, usually. Most of its body was covered in rigid plates. It had eight appendages beneath the ground used for stability or for reburial if the sarlacc became partially exposed. The body of the sarlacc ended in three roots used for moisture absorption.
Despite their size, the sarlacc did not need to eat very much at a time. They were almost entirely immobile, which means they had to be able to survive for prolonged periods without food. As a result, they also digested their food very slowly. It was even said that sarlaccs could be telepathic and could gain consciousness from the creatures they ate by assimilating their thoughts and memories during digestion.
The sarlacc's body did not have a skeletal structure or a solid framework, but it did possess a strong muscular body with large roots and a series of nerve endings on its skin.
The sarlacc also had roots on the outside of its body to leach the nutrients from the ground and to sense the vibrations from creatures on the desert sands. The sarlacc lacked eyes and ears, instead relying on the sensors in its roots to "see" its prey. The sarlacc's mouth contained large mucus-coated teeth and strong tentacles for catching prey. The tentacles grabbed prey and pulled them into its maw, whereas the inward-pointed teeth functioned to keep victims in the mouth.
The sarlacc also had a large beak that emerged from the throat. The "beak", in reality, was the sarlacc's tongue, and the tongue within the tongue was actually yet another stubby tentacle that aided in swallowing prey. The sarlacc's throat had many veins and vessels which acted as sensors to determine the size, weight, and strength of the victim, allowing the sarlacc to decide which stomach to put its prey into; stronger prey were put into the secondary stomachs, while smaller prey went into the main stomach.
The sarlacc's throat also possessed many microscopic openings that dispersed mucus to keep the throat healthy—the sand, gravel, or whatever the case was (as environment varies from one sarlacc to the other) that dropped into the mouth could damage the lining of the throat. The more the sarlacc ate, the more the stomachs ran out of room, and, in rare cases, it used a small number of its victims to grow the stomachs by enmeshing those few victims into the stomachs. The sarlacc also used small air holes around its mouth for breathing.
The sarlacc's roots functioned as tentacles during adolescence, and then grew into full immovable stalks during adulthood. They absorbed tiny fungal life forms, bugs, and microscopic cells and bacteria into the body from the ground for nutrients. The sarlacc's body could also absorb liquid molecules through small openings in the roots, to keep its water level up.
Only the sarlacc's gaping maw could be seen from the surface, with the vast majority of its huge body lying beneath the ground. It lay in wait for any living creature to stumble into its maw, and additionally, it pulled nearby victims in with one of its many tentacles. A sarlacc's mouth was surrounded by rows of retractable razor-sharp teeth, used to chew victims during adolescence, before the digestive system was fully formed. Adult sarlaccs developed a beaked, snake-like tongue at the center of the fearsome pit, which doubled as a mouth.
After being swallowed by the tongue, the victim made its way into the sarlacc's stomach to be digested, purportedly being kept alive and slowly digested for a millennium. A strong network of vessels inside the stomach punctured the victim's skin and muscles and then embedded itself into victims before injecting neurotoxins into them, preventing the victims from escaping and ensuring that they remained immersed in the acidic fluids in the stomach, and attached to the walls of the stomach.
The vessels also provided victims with nutrients to keep them alive while they were digested in agony; sometimes when a victim was in the stomach for a long time period, the sarlacc actually embedded it in the lining of the stomach to make room for other victims it swallowed and to make the stomach stronger so that other victims could not escape.
The tentacles on the mouth were actually thin strong tongues that could feel and taste the ground and prey. The beaks of other sarlaccs had other tongues within their beak that emerged to grab prey and directly pull them into its beak. The tentacles were known to stretch as far as four meters to grab prey.
A number of smaller, secondary stomachs were used to store victims for later consumption at times when the sarlacc needed larger amounts of nutrients, such as when it needed to grow, breed, or strengthen its tentacles and beak for catching stronger, larger prey. The secondary stomachs also functioned as a space to store victims when the main stomach ran out of room, although this was rare. The acidic fluids in the stomachs was composed of powerful chemicals that took much longer to digest prey than acids in the stomach of other creatures. They specifically targeted skin and muscle tissue, because that was where the nutrients in the victims were. The secondary stomachs were also lined with more vessels and were smaller and more cramped to enclose the victims in, so that the sarlacc did not have to deal with the victim trying to escape its hold. The pain endured by its victims in this process was reputed to be unimaginable, with only rare individuals such as Boba Fett being able to resist.
In addition to the acidic fluids that digested the outer portions of the victims, the sarlacc also processed its victims from within. The sarlacc's blood was highly caustic, and was employed in the digestion of prey. The tendrils and vessels pumped the sarlacc's acidic blood into its victims to digest the inside of their bodies, and to carry back nutrients from the victims. This process also provided the victims with minimal sustenance.