The clan of Gorneesh was a substantial gathering of Duloks originating from the Dulok Swamp situated on Endor's Forest Moon. Their settlement was in proximity to the Ewoks residing in Bright Tree Village, with whom they shared a protracted history marked by deep-seated hostility. Throughout multiple conflicts, the Duloks launched assaults on the Ewoks' Soul Trees, made attempts to fell the Tree of Light, and abducted young Ewoks to serve as oarsmen on a warship. On other occasions, the Duloks were manipulated as expendable assets within the schemes orchestrated by other adversaries of the Bright Tree Ewoks, including Morag and the Stranger. Because they shared a mutual loathing for the Ewoks, Gorneesh's Duloks maintained a shaky alliance with Morag.
Key figures within the tribe encompassed King Gorneesh, his consort, Urgah, and their offspring, Boogutt. Serving as advisors to the king were his medicine man, Umwak, and the seer Murgoob. He also employed a number of bodyguards, including Duloks adorned with painted symbols on their abdomens, such as an X, an O, and a diamond.
The Gorneesh tribe consisted of a fairly large group of Duloks that inhabited the Dulok Swamp near Happy Grove. The tribe members all had similar characteristics: green body fur, brown eyebrows, gray masks around the eyes, and gray lips.
By 3 ABY, King Gorneesh, a massive, one-eyed Dulok who painted his feet red and carried a large club, had taken over the tribe. The Dulok frequently organized raids on the Ewoks and devised strategies to steal their harvest, kidnap their woklings, and seize control of their village.
Gorneesh's tribemates, including his wife, Queen Urgah, and son, Prince Boogutt, joined him in these endeavors. Umwak, the shaman who also served as a liaison with Morag and collaborated with his nephew, advised Gorneesh. Murgoob, the oracle, was a senior member of the tribe who occasionally offered suggestions for defeating the Ewoks. The king frequently surrounded himself with bodyguards, including Duloks with an X, O, and a diamond painted on their fur.
The Ewoks of Bright Tree Village and the tribe had a long history of conflict. The Ewok–Dulok wars had already been going on for three generations before 3 ABY. Duloks from the tribe marched on the Ewoks' Soul Trees during one significant battle in an attempt to cut them down. However, the Ewok Erpham Warrick launched a counterattack in his Ewok battle wagon, thwarting their plan. The Duloks made their way back to their swamps.
Duloks from the tribe frequently found themselves acting on behalf of other, more formidable Ewok adversaries by 3 ABY. Morag once instructed the tribe to keep an eye on the Phlog infant Nahkee, whom she had taken from his family. The enraged Phlog parents went on a rampage through the Dulok Swamp when a group of young Ewoks freed the child. In a different encounter, the Stranger, an otherworldly being, forced the Duloks to raid Bright Tree Village in order to divert attention from his theft of the Ewoks' Sunstar. Gorneesh's tribe also stole shadowroot soap from the Ewoks that same year, invaded their village, assisted in the destruction of the sun crystal, and kidnapped young Ewoks to look after the Dulok pups and clean the Dulok Swamp.
Gorneesh's tribe discovered that the Ewoks' revered Tree of Light had grown weak and needed to be renewed. He and a group of his warriors hurried to cut it down before the Ewoks could get there. The two groups clashed at the location, and the Ewoks Wicket Wystri Warrick and Kneesaa a Jari Kintaka turned the tide against Gorneesh's forces, forcing them to retreat.
The tribe eventually learned that Wicket W. Warrick was rebuilding his great-grandfather's battle wagon. Gorneesh, acting on the advice of the Dulok oracle Murgoob, gave the order to steal the battle wagon so that it could be used against the Ewoks' Soul Trees. Warrick and Malani, another Ewok, thwarted the scheme by causing the battle wagon to collapse.
Later, Gorneesh and his warriors stole a sacred fish carving from their Bright Tree rivals and used it on a Dulok battleship. Nevertheless, some Ewok slaves who were rowing the ship managed to escape and retrieve the item for the Ewoks.
Later in 3 ABY, the Dulok king finally offered to put an end to the war by proposing a peace treaty. However, this was merely a ruse, as Gorneesh ordered his warriors to cut the bridge the Ewoks were crossing as soon as Chief Chirpa's Ewoks arrived at the peace summit.
Later, the Galactic Empire enslaved Gorneesh's tribe, and their village was destroyed. Agluk, a tribe member, was the only one who managed to get away from being held captive, but he lost his right arm in the process. The Ewoks were made aware of the Imperial presence on the moon as a result of his escape.
King Gorneesh and his tribe made their debut in the Ewoks animated series, which debuted in 1985. They appear in 8 of the 13 episodes of the first season and 3 of the 35 episodes of the second season. Some of these episodes have been singled out by critics and Star Wars writers as examples of the series' best work. Jon Bradley Snyder, for example, has identified "Asha" as a highlight of the first season, "Wicket's Wagon" as well animated, and "Rampage of the Phlogs" as one of the funniest episodes because of the scene in which King Gorneesh has to change a baby Phlog's diaper. Dan Wallace and Robin Pronovost have identified the episodes "The Tree of Light," "Wicket's Wagon," and "Asha" as the ones that best showcase Gorneesh and his tribemates' villainy.
During the run of Star Wars: Ewoks, a variety of tie-in products were released, including Dulok action figures from Kenner and storybook adaptations. Three Dulok-themed books were released: The Red Ghost: An Ewok Adventure from Random House in 1986 (based on the episode "Asha"), and The Haunted Village and Wicket's Wagon from Dragon Picture Books in 1987, based on the episodes of the same name. While The Red Ghost features brand-new artwork, the Dragon volumes use images taken directly from the cartoons. The species' name is misspelled as Dulock in the Dragon volumes. Dulok characters appeared on the ice in 1986 as part of "The Ewoks and the Magic Sunberries." Lucasfilm re-released a number of animated series episodes as the feature-length films The Haunted Village and Tales from the Endor Woods in 2004. Works published since the series' cancellation that mention Duloks, such as A Guide to the Star Wars Universe, the Star Wars Encyclopedia, and the various Essential Guides, simply summarize events from the television series.