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Tribbles graphic, Generations

A graphic of tribbles

Tribbles (Polygeminus grex) are small, non-intelligent lifeforms originating from Iota Geminorum IV. Known for their prodigious reproductive rate, these round, furry creatures emit cooing sounds while touched, which have a tranquilizing effect on the Human nervous system. Born pregnant, a single tribble with sufficient food can quickly increase its number exponentially through presumably asexual reproduction, bearing an average litter of ten every twelve hours. On their homeworld, tribble populations are kept in check by a large number of reptilian predators. (DS9: "The Nagus"; TOS: "The Trouble with Tribbles"; ENT: "The Breach")

The homeworld and scientific name of the tribbles appeared on the chart in Keiko O'Brien's classroom on Deep Space 9. The chart artwork, contributed by DS9 art department illustrator Doug Drexler, are the same component illustrations he had originally prepared for the fan-published Star Fleet Medical Reference Manual in 1976, then reprinted in 1978 as a licensed book by Ballantine.


Phlox and Hoshi with a tribble

Doctor Phlox shows Hoshi Sato a tribble in 2153

Tribbles were first encountered by Humans in the early 2150s when Denobulan doctor Phlox brought a small number aboard Enterprise NX-01 as an easily-sustainable food source for his pets. (ENT: "The Breach")

Kirk surrounded by Tribbles

Kirk gets buried in tribbles in 2268

The tribble was later encountered by the Federation aboard Deep Space K-7 in 2268, when Cyrano Jones brought a small number aboard to trade. However, a single tribble brought aboard the USS Enterprise quickly multiplied. The tribbles were instrumental in foiling a Klingon plan to poison a shipment of quadrotriticale intended for Sherman's Planet, when those that had fed on the grain were found dead. (TOS: "The Trouble with Tribbles")

At the same time, the crew of USS Defiant, transported through time by Arne Darvin, prevented him from using a tricobalt device hidden inside a tribble to kill James T. Kirk. (DS9: "Trials and Tribble-ations")

Tribbles were an ecological menace for the Klingons, to whom a tribble would react violently. The Klingons first attempted to breed a predator to eliminate the threat. The glommer was used only once, in 2269, aboard the USS Enterprise, and proved unable to deal with the large number of tribbles aboard. (TAS: "More Tribbles, More Troubles")

Tribble colony in Kirks chair

Kirk's captain's chair overtaken by a tribble colony.

During this time, Cyrano Jones attempted to genetically engineer the tribbles so that they would not reproduce. As a result of his dabbling, he deemed them to be "safe" so as to be compatible with humanoid ecologies, making them "great pets and profitable, too." Unknown to Jones, at the time, and as was later discovered by Doctor Leonard McCoy, Jones' genetic engineering was described as being "very slipshod," as the resulting tribbles appeared to grow in immense size, instead of rapid breeding. McCoy later discovered that the so-called "giant tribbles" really were not as they appeared, but rather colonies of tribbles. McCoy was able to remedy the situation by giving them "a simple shot" of neo-ethylene, which caused the tribble colonies to break down into their individual units with a slower metabolic rate, and finally becoming "safe tribbles." (TAS: "More Tribbles, More Troubles")

Tribbles on Earth

Tribbles on Earth (2285)

The Klingons' final solution to the tribble menace was to wipe the species out entirely. Klingon warriors were sent to hunt them down throughout the galaxy, and the tribble homeworld was obliterated in the late 23rd century. When told of this, Odo dryly remarked, "Another glorious chapter in Klingon history. Tell me, do they still sing songs of the Great Tribble Hunt?" (DS9: "Trials and Tribble-ations")

In spite of the destruction of the tribble homeworld, many Humans continued to have the small creatures as pets from the late 23rd century, well into the late 24th century, as one child aboard the USS Enterprise-D appeared to have one as a pet in 2371. (Star Trek III: The Search for Spock, Star Trek Generations)

Information about tribbles was displayed by the computer in Keiko O'Brien's schoolroom on Deep Space 9 in 2369. (DS9: "A Man Alone", "The Nagus") Tribbles were displayed in an LCARS graphic in one of the USS Enterprise-D's science laboratories when the ship crash-landed on Veridian III in 2371. (Star Trek Generations)

DS9 Promenade infested with tribbles

Deep Space 9's promenade overrun with tribbles in 2373

Tribbles were reintroduced into the 24th century when Captain Benjamin Sisko and his crew brought at least one of the creatures back to 2373, following a time-traveling visit to the tribble-infested space station K-7 of 2268. The promenade and Quark's Bar on Deep Space 9 were subsequently overrun with the creatures. According to Captain Sisko, the Federation's Department of Temporal Investigations was not told about the reintroduction of the tribbles because "they didn't ask." (DS9: "Trials and Tribble-ations")

Miles O'Brien later recalled seeing the tribbles on the Enterprise with Julian Bashir when he was leaving Deep Space 9 at the end of the Dominion War. (DS9: "What You Leave Behind")

Alternate reality

Tribble on Delta Vega

Tribble on Delta Vega.

In an alternate reality, Montgomery Scott had a tribble at his station on the Delta Vega outpost. (Star Trek)

It is revealed in IDW's "The Truth About Tribbles, Part 2" that tribbles do not reproduce in cold temperatures, explaining the sole tribble in Scotty's station.



In the audio commentary for "More Tribbles, More Troubles", David Gerrold explains that the idea for tribbles came from the fuzz-ball keychain of a college girlfriend of his, named Holly Sherman, for whom Sherman's Planet is named. He also mentions that Wah Chang hired a woman named Jacqueline Cumere to make five hundred tribbles for "The Trouble with Tribbles", and explains the procedure for making them.

Tribbles are made from a piece of "figure-eight shaped" fake fur, sewn up to make a ball about five inches in diameter. The ball is filled with foam rubber; some tribbles were made by sewing a decapitated walking toy dog inside the fur skin, and the toy activated to make the tribble crawl, as revealed in the DVD commentary by Michael and Denise Okuda for "The Trouble with Tribbles".

Following the making of "The Trouble with Tribbles", tribble props were repeatedly found around the set of Star Trek's original series. Commented DeForest Kelley, "We'd had these tribbles everywhere. They had them in the prop room and they kept showing up here and there for weeks after we filmed the episode. A tribble might show up as an extra breast on Nichelle [Nichols] or something like that. I guess everybody was still kind of tribble happy and every time we got to work a tribble in somewhere, we were working them in. Instead of pulling out a communicator, somebody would pull out a tribble. They'd continually pop up somewhere. Pull out a drawer and somebody would reach for something and there'd be a tribble there [....] It took weeks to get all the tribbles off the set." Kelley also remembered that – in a scene of an episode that he reckoned was "probably" "Journey to Babel", where his character of Dr. McCoy was meant to be making a surgical incision in another character – he (as Dr. McCoy) apparently removed a tribble from the patient after making the incision, an action that provoked much laughter on the set. (The World of Star Trek, 3rd ed., p. 86)

Having appeared as Klingon captain Koloth in "The Trouble with Tribbles", actor William Campbell was made aware of how extremely popular the tribbles were with fans. "The actors weren't really the stars of the show, those little animals were," Campbell opined. "They really intrigued whoever watched it. One little girl even made a tribble and sent it to me." (The World of Star Trek, 3rd ed., p. 121)

Director Joseph Pevney once speculated that, if tribbles had been proposed to make their debut appearance during the third season of the original series rather than the second, the idea would have been rejected, due to the regular cast becoming increasingly concerned about being seen as the heroes of the series. Argued Pevney, "The hero of the show was a little fuzzy animal, and they don't want that. They want to constantly be the heroes." (Captains' Logs: The Unauthorized Complete Trek Voyages, p. 48)

In "More Tribbles, More Troubles", the tribbles appear pink in color. Unknown to the rest of the production staff, the director, Hal Sutherland, was colorblind, so to him, pink was light gray.

In the audio commentary for "How Sharper Than a Serpent's Tooth", David Wise mentions that Kukulkan's zoo was to have included tribbles.

Harve Bennett once characterized the tribbles in Star Trek III as "Christmas stocking presents to the fans" and went on to say, "That's, 'Hey, kids, you came to see the movie, here's a treat, it's our joke.'" (The Star Trek Interview Book, p. 271)

An edible tribble was designed to be ripped open as a snack by one of the Klingon guards on Rura Penthe in Star Trek VI: The Undiscovered Country, filled with gummy worms and tapioca "guts," but it was not seen in the movie, as it was thought to be too disgusting. A scepter that Rura Penthe's commandant carries has fur that was scripted to be from a tribble. (The Making of the Trek Films, 3rd ed., p. 129)

Some of the most memorable ways in which tribbles are featured in "Trials and Tribble-ations" were devised by DS9 writing staffer Ronald D. Moore. These ideas included tribbles being tossed out of the storage compartment bin from "The Trouble with Tribbles" by one of the DS9 crew – hitting Kirk on the head with them – and another tribble actually being what is more-or-less a disguised bomb. (Star Trek: Deep Space Nine Companion, p. 384)

The tribble props for "Trials and Tribble-ations" were obtained from Lincoln Enterprises. Prop master Joe Longo later recalled, "We bought 1,400. .... [They] only had about 600 there and had to make up some more – it took two weeks. And then we had to make up some in Drapery; we didn't have enough of the large ones." (Star Trek: Communicator issue #110, p. 55)

DS9 special effects supervisor Gary Monak and his team of live effects artists at Paramount were tasked with matching the actions of operable tribble props in "Trials and Tribble-ations" with the equivalent props of thirty years beforehand. This was despite the fact that the DS9 episode features more moving tribbles than there are in "The Trouble with Tribbles". Reported Monak, "We're having about 50 different moving ones made up; they're all pretty much like crawlers or wigglers, the one that's supposed to jump when it sees Klingons is a remote control one we've made." The workings inside the latter prop consisted of a variable-speed wheel with an off-center gearing. (Star Trek: Communicator issue #110, p. 58)

Writer/producer Roberto Orci once claimed that, at least to Humans, tribbles are "potentially poisonous, like blow fish." [1]

The tribble in the film Star Trek was operated by remote control, used by a production staffer standing just out of the camera's line of sight. (Star Trek Special Edition/Three disc Blu-ray documentary featurette "To Boldly Go")

Two tribble fur balls were sold together in the 40 Years of Star Trek: The Collection auction for US$4,800. The lot had been estimated to bring in only between US$800 and US$1,200. These tribbles were made for the Deep Space Nine episode "Trials and Tribble-ations". (citation needededit)


According to the Star Fleet Medical Reference Manual, the mutual dislike between Klingons and tribbles has to do with the fact that both species have keen senses of smell, and apparently, each found the "stench" of the other extremely unpleasant. Tribbles also found food using their sense of smell.

In the novelization of The Wrath Of Khan, when McCoy gives Kirk a birthday present, Kirk (under the influence of Romulan ale) asks, " it a tribble?!"

In the TNG novel Q-in-Law, Q taunts Worf by offering him a tribble as a present. Worf shares most Klingons' instinctive loathing of the creatures, a fact later confirmed in "Trials and Tribble-ations".

In the DS9 novel The Big Game, Odo does not allow a tribble to be brought onto Deep Space 9 until it is confirmed to be sterile.

In Star Trek Online, the tribbles' tranquilizing effect on the nervous system is used as a healing factor during gameplay. They can also be bred by introducing them to various foodstuffs, giving the player access to different subspecies of tribbles that bestow different benefits. They also seem to spontaneously breed if there is at least one in the player's inventory.

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