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3614
Argelians
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Planet: Argelius II. Despite the hedonistic nature of the natives of Argelius II, their planet has long been known as a friendly shore-leave spot for Starfleet — even after the murderous...

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4187
Kzinti
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Also known as Kzin, the Kzinti are a race of sentient feline carnivores native to the planet Kzin. Kzinti are highly sexually dimorphic, at least in terms of intelligence; only the males are...

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Slaver Empire
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A galactic power that held sway over virtually all sentient life in the Milky Way Galaxy approximately one billion years ago, the Slaver Empire and its subject races were wiped out in a colossal...

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4523
Tribble
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Origin: unspecified. A small animal characteristically soft, furry, and pleasing to most humanoids (with the exception of Klingons). Tribbles give off a soft purring sound that is...

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4978
Rigelian Hypnoid
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A six-legged creature with purple fur, a long tail, and yellow eyes and claws. About the size of a medium-size dog, the Rigelian hypnoid can project simple illusions, and speak. In 2269 (stardate...

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Rock Creature
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A giant monster seemingly made of brown stone, the "rock creature" is encountered on an uncharted planet by Captain Kirk, Mr. Spock, Nurse Chapel, and conman Harcourt Fenton Mudd in 2269 (stardate...

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Ursinoid
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A race of bipedal creatures, ursinoids have brown skins, and resemble a cross between an ape, and a bear, with a dog-like snout. Both male and female ursinoids work as heavy metal miners on the...

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5143
Vendorians
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A race of sentient shape-shifters native to the planet Vendor. In their natural form, Vendorians look rather like floating orange lamps adorned with six trailing tentacles. Because of their...

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5275
Dramians
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Native to the remote planets of Dramia and Dramia II , the Dramians are tall creatures who have a vaguely humanoid appearance, with yellowish skin, bulbous fish-like heads with large craniums, and...

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5329
Glommer
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A predator that feeds on tribbles, a glommer is larger than the average hand, and has a reddish four-legged body. Each leg has two joints, and the foot pads have four toes. The glommer also has...

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5371
Cosmic Cloud
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A sentient, spaceborne entity that stretched across eight hundred thousand kilometers of space, with a width of about four hundred thousand kilometers. The creature's length measured roughly twice...

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5373
Le-Matya
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This native animal to planet Vulcan is a large, mountain lion-like desert predator with a poisonous bite . It is capable of killing Vulcans and sehlats.

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Sehlat
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A large, bear-like animal native to Vulcan, sehlats typically possess six-inch fangs. Although sehlats can be ferocious in the wild, Vulcan families frequently domesticate them as pets. Spock had...

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5499
Aquans
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The race of sentient humanoids living beneath the waters of the planet Argo are unknown to the Federation prior of 2269. When the crew of the U.S.S. Enterprise investigates the world, its officers...

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Sur-Snake
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A large scarlet colored sea beast on the planet Argo, the sur-snake has four long tentacles ending in flippers, a pair of yellow eyes, a dorsal fin, and fangs. When a Federation aquashuttle is...

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5501
Lactrans
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Giant creatures that resemble slugs, the orange Lactrans each have individual reddish markings on their backs and faces. They have two yellow eyes and a trunk which ends with three grasping...

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Maravel Dragons
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A flying, screeching creature indigenous to Maravel, and apparently resistant to phaser fire. When Captain Kirk and his landing party are on Lactra VII in 2269 (stardate: 5501.2), Kirk remarks...

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5521
Edosian
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A tripodal, polytheistic race from the planet Edos. An Edosian has three legs, three arms, and three fingers on each hand and foot, with orange skin and a bony face. Lt. Arex is Edosian. Edosians...

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Magnetic Organism
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An intelligent, noncorporeal life form consisting of coherent magnetic fields, sometimes manifesting itself visually as a luminous green cloud. A malevolent magnetic organism inhabited the dead...

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5554
Phylosians
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Sentient plant people native to the planet Phylos, the Phylosians of the twenty-third century are heirs to a civilization that is long past its prime — a civilization they wish to see...

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Swooper
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A large, ferocious, birdlike flying creature that is actually a motile plant, like much of the life on its native planet Phylos. Swoopers typically measure more than five meters in length, and...

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5577
Gossamer Mice
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Test animals used in the medical laboratories of the U.S.S. Enterprise in 2269. Because these small, rodent-like extraterrestrial creatures are nearly transparent and are extremely sensitive to...

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Halo Fish
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Alien fish that bear a resemblance to terrestrial angelfish, except for the bright halo of multicolored light they emit. Because halo fish lose their colorful illumination in response to any...

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Terratins
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The descendants of the human settlers of the only planet orbiting the star Cepheus, the Terratins were shrunk to a few millimeters in height by the strange spiroid energy waves that suffuse the...

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5591
Pterodactyls
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Flying reptiles which existed from Earth's Triassic period to the end of the Cretaceous period, pterodactyls are properly called "pterosaurs." In 2269 (stardate 5143.3), when the starship...

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5683
Skorr
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A race of avian creatures, the Skorr are a fierce and proud race who were once great warriors with advanced military technology and the ability to breed vast armies rapidly. According to Vulcan...

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Vedala
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According to Federation records, the Vedala are the oldest known spacefaring civilization. One representative of the Vedalan race is met in 2269 (stardate: 5683.1), by Captain Kirk and Mr. Spock....

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6063
Capellan Power-Cat
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The fierce Capellan power-cat hails from the planet Capella IV. Untamable, it will discharge 2,000 volts of electricity if even touched by another creature. Only a hypo with tranquilizer at its...

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7403
Eggling
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Because Pandronians are hatched from eggs, Commander Ari bn Bem compared himself to an "eggling" — a newly hatched Pandronian youngster — to express how humbled he felt on stardate...

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Pandronians
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A light-green-skinned race of humanoid-appearing creatures native to the planet Pandro. Unlike virtually all other known humanoid species, however, Pandronians are actually "colony creatures"...

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44356
Breen
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Planet: name unspecified. A humanoid species from a cold planet who operate in a politically non-aligned manner and are reputed to be aggressive, with outposts in Sector 97. It is presumed that...

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45761
Kriosians
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Planet: Krios. The tall, slender humanoid members if this species share similarities in their skin pigments — a dark-spotted, skin pattern along the hairline and down the neck and spine...

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46379
Bajorans
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Planet: Bajor Humanoid race, distinguished outwardly only by extra wrinkles at the bridge of the nose, have wandered the galaxy and settled on various worlds ever since their homeland was...

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Cardassians
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Planet: Cardassia   Tall, long-necked, humanoid in appearance, marked by several bony protrusions and ridges: one from the shoulder to under the ears, whose bottom lobes in turn are more...

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Changeling
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Origin: Gamma Quadrant Little is known about this strange race. They call themselves Changelings, a name adopted from others' use. The Changelings are the highest order in a Gamma Quadrant...

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Ferengi
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The homeworld of the Ferengi species is Ferenginar. The Ferengi have a culture which is based entirely upon commerce. They follow a code of conduct known as "The Ferengi Rules of Acquisition."...

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Frunalian
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Origin: the Alpha Quadrant. An alien species which took an early scientific interest in the discovery of the Bajoran wormhole near the Deep Space Nine space station. This species has also...

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Prophets
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Origin: Bajoran wormhole According to Bajoran religious doctrines, the prophets are the spiritual protectors and guides to the Bajoran peoples. Throughout Bajoran history, several unusual...

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Symbionts, Trill
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Only 300 symbionts are available for hosting each year on average. If a host is weak, the personality of the symbiont will overwhelm it. Unless its current Joined Host objects, a prospective Host...

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Trunkhead Aliens
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Planet: unspecified. Commonly seen in Federation faciliities such as DS9. A dull brown-skinned race with pointed upswept ears and a long, trunk-like, fleshy protrusion from the back of the skull...

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Wormhole Aliens
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Origin: The Bajoran wormhole. Non-corporeal, non-linear telepathic race who built the wormhole adjoining Bajor some 10,000 years ago and worshiped by the natives there as "The Prophets" because of...

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46401
Joranian ostrich
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Planet: name unspecified. An alien ornithic species with an extremely fearful disposition. Fear has developed notable evolutionary flaws in the species; if frightened, the Joranian ostrich is...

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46410
Wadi
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Origin: Gamma Quadrant Space-faring and game-loving humanoid race (pronounced "WAH-dee") from an unspecified planet whose people are the first formally known to be contacted from the Alpha-Beta...

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46421
Garanian Bolites
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Extremely small creatures which act as irritants when they come into contact with humanoid skin, as two unsuspecting Bajorans learned due to a trick played on them by Jake and Nog in 2369.

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46495
Hunters
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Origin: unknown planet in the Gamma Quadrant. A humanoid race who live to pursue the Tosk in an endless life-and-death hunt, never contacted again after a single incident on DS9 in 2369 soon after...

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Tosk
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Origin: Gamma Quadrant A reptilian race, bred by unspecified eugenicists to enjoy being hunted and provide as exciting and interesting a chase as possible. They live only to outwit their Hunters...

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Vulcans
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Planet: Vulcan A humanoid race, with copper-based blood, slightly green-tinted complexion and notably pointed ears, they are responsible in a large part for the founding of the Federation. Over...

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46531
Verathans
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Origin: the Gamma Quadrant. A humanoid race (pronounced "vuh-RATH-uns") whose civilization reached its height 30,000 years ago, spanning over two dozen systems interconnected with a highly...

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46578
Yridians
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Planet: name unspecified. This wrinkly-skinned alien species famed as information merchants was known to the Vulcans before humans, at least in the altered but impermanent future during Archer's...

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46594
Kobliad
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Origin: unspecified planet near the Bajoran system. Dying humanoid space-faring culture near the Bajoran system (pronounced "KOH-blee-add") who use Federation-supplied deuridium to stabilize their...

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46649
Dolbargi
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A culture capable of a self-induced death-simulation technique that is teachable to and usable by others, including Hupyrians and Ferengi — as servant Maihar'du taught Grand Nagus Zek.

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Hupyrians
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Planet: name unspecified. A tall, facially-wrinkled, white-skinned, mute, humanoid species, many members of whom can be found working for important Ferengi officials because the Hupyrians have a...

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Tarahongians
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Planet: name unspecified. A people (pronounced "tair-uh-HONG-ee-uns") who are naturally gullible — at least according to Quark, who shrugs off Grand Nagus Zek's praise at selling their...

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46715
Altorans
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Origin: unknown. Rumored to be traders with the Miradorn species.

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Miradorn
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Planet: name unspecified. A race (pronounced "MEER-a-dorn") in which all are twins who make up a single self as two halves of one being — a "quarrelsome people," according to Quark. Natives...

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Rakhari
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Planet: Rakhar, Gamma Quadrant. Humanoid race distinguished by heavy ridges down the nose and full heads of bushy hair. Aware and unafraid of space-farers, they cared little about outside contact...

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Vanoben
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Planet: name unspecified. The otherwise nondescript home (pronounced "van-NOBB-un") of a transport ship raided only two light years from Deep Space Nine, when an artifact similar to one being...

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46729
Dal'Rok
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Planet: Bajor. A unique creature made of energy that is fabricated for five days of every year by the Bajoran Sirah to place two opposing villages against a mythical creature and thereby continue...

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46753
Ennis/ Nol-Ennis
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Origin: Gamma Quadrant. Two humanoid factions of the same species who fought for so long they were banished to a prison moon to continue their fighting, able to finally die only if they escape the...

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46844
Carnivorous Rastipod
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Origin: Bajor. An animal reputed for a distinct lack of grace — apparently, a beast with two left legs.

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46853
Beneriam Hawk
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Planet: name unspecified. A predatory ornithoid life-form to whom Chief of Security Odo was compared on stardate 46853.2.

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Gunji jackdaw
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Origin: Alpha Quadrant. A species resembling an ostrich, spotted on Deep Space Nine's Promenade on stardate 46853.

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46910
Argosian
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Planet: Argosia. An alien species, one member of whom once threw a drink in Commander Sisko's face and nearly caused a brawl to break out.

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Klaestronians
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Planet: Klaestron IV. An advanced space-faring humanoid race that is distinguishable in appearance by an ear ridge that comes forward to the eye, raising the hairline over the ear. The world was...

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46922
Kaleans
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Origin: unknown. An unfriendly group of this race (pronounced "CAL-ee-uns"), once confronted Curzon Dax and Commander Sisko on Rochani III.

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Saltah'na
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Origin: Gamma Quadrant. An ancient race (pronounced "sul-tu-NAW") that was entirely destroyed by a massive power struggle. The events were described in a telepathic archive contained in energy...

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Valerians
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Origin: unknown. This humanoid space-faring race of the Alpha Quadrant delivered weapons-grade dolomide to the occupying Cardassians on Bajor and were suspected of still doing so in 2369 at DS9,...

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46925
Arbazan
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Planet: Arbaza A humanoid race (pronounced "ARR-buh-zahn"), mostly distinguished in appearance by a high forehead hairline. The word is used as both the adjective and with "the" as the noun for...

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Avianoid Aliens
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Members of this unspecified humanoid species distinguished by white, shaggy hair and a beak-like mouth continuing up into a Klingon-like forehead ridge are seen frequenting DS9. One wealthy native...

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Bolians
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Planet: Bolarus IX A Federation race of humanoids, most distinguishable in appearance by the narrow yet distinctive ridgeline running at least from over the skull from the spine to the nose and...

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Liseppians
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Planet: Liseppia. A humanoid, non-aligned space-faring race distinguished by finger-like projections from the chin downward and a large, hard-skinned bare head with a pattern of ridges radiating...

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Nehru Colony
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Origin: Federation colony near station Deep Space 9 and the Bajoran system. Contacted via subspace link under the orders of science officer Jadzia Dax in 2369, in an attempt to rescue the...

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Wanoni Tracehound
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Planet: name unspecified. An predatory animal life-form rumored to take great pleasure in the pursuit of its prey. On stardate 46925.1, Constable Odo was heard comparing the romantically...

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46963
Kobheerians
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Planet: name unspecified. The bald, reptilian-skinned space-faring race resembling Liseppians and Dopterians with a skull-encircling ridge are a common trader with Cardassia Prime directly.

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47105
Yelikans
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Planet: name unspecified. Space-faring culture with a transport set for departure from Deep Space Nine in 2370, when Minister Jaro announced Kira's recall to Bajor.

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47229
Elaysians
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Planet: name unspecified. A space-faring humanoid people of a low-gravity world; only a handful have ventured off-planet, requiring the use of anti-grav wheelchairs whenever they leave. They have...

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Invernians
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Planet: Invernia II. Apparently humanoid species (pronounced "ihn-VUHR-nee-ahnz") and linked to the United Federation of Planets by treaty, possibly as members. A native girl about 10 died while a...

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Oxygenes
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Origin: unspecified. By implication, an oxygen-breathing species otherwise unspecified but apparently of Alpha or Beta quadrant origin. The species was known to Curzon or a previous Dax host,...

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47307
Dominion, The
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Origin: Gamma Quadrant A mighty planetary alliance or trading consortium in the Gamma Quadrant, at first unknown to most beyond the wormhole.   Composed of "hundreds" of dominated races,...

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Dosi
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Reptiloid race of the Gamma Quadrant and client states to the Dominion who are profit-driven like the Ferengi but, in stark contrast, tend to violence. Known to Zek for its tulaberries and wine,...

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Morn
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The ubiquitous alien and Quark's most frequent patron. His affection for Phalosian, adult holosuites, is well known to Quark, and he's the first to try out a new cycle Quark obtains circa stardate...

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47329
Aliens, Thed
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It may or may not be species-related, but suspicious character Villus Thed has short-range telepathic powers up to five meters away.

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Halanans
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Planet: Halana. Humanoid and perhaps dark-skinned natives of Halana who rejoiced over Dr. Seyetik's terraforming of the paradise-like New Halana. They mate for life and carry abilities of...

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47391
Reegrunion
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Planet: name unspecified. Species of illegal arms trader Plix Tixiplik.

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Skrreea
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Origin: Gamma Quadrant. A matriarchal humanoid Gamma Quadrant race dominated for 800 years by the T-Rogorans and forced to work as laborers and servants until the captors themselves were conquered...

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T-Rogorans
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Origin: Gamma Quadrant. A Gamma Quadrant race who ruled the Skreea for 800 years and killed the matriarchal people's leaders until they in turn were invaded and conquered by some "member" of the...

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47426
Pythrons
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Planet: Pythron V. A space-faring race.

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47529
Kelleruns
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Planet: name unspecified. Humanoid, advanced space-faring species, native to the Alpha Quadrant. Having just ended a centuries-old war with the T'Lani, which included use of the Harvester...

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47581
Paradas
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Planet: exact name unspecified. Humanoids with upswept, line-textured faces and skin almost resembling some Terran mollusks or seashells. As a species, they give off an odor from skin secretions...

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47603
Changeling, Evil
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Origin: The Gamma Quadrant. A character in a Yaderan tale retold by Taya to Constable Odo, somewhat reminiscent of the Terran Hindus' "Brahman and the Tiger." After powerful displays of morphing...

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Yaderans
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Origin: Gamma Quadrant. As evidenced by their holographic recreations discovered in 2370, this mostly humanoid and gentle people reflect Terran norms, with distinctive architecture and a yen for...

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47641
Initiate
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Another term for potential Trill host candidates.

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47832
Xepolites
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Planet: name unspecified. A humanoid, almost amphibious-looking space-faring race (pronounced "ZEPP-oh-lights") that include traders who often acted as go-betweens for the Cardassians — as...

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47879
Bajorans, Mirror Universe
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Planet: Mirror Bajor. The Bajorans in this continuum are a member of the Klingon-Cardassian Alliance, and as such have control of Terok Nor. Even these confident and self-assured Bajorans take...

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Cardassians, Mirror Universe
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Planet: Mirror Cardassia. Cardassians would still seem to harbor the same attention to detail as ever in the Mirror Universe, where they likewise seem as efficient as always, whether in killing or...

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Klingons, Mirror Universe
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Planet: Mirror Qo'noS. Klingons are still ferocious and stout warriors in the Mirror Universe, where they have entered in to an Alliance with the Cardassians there after defeating the Terran...

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Terrans/2
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Planet: Mirror Earth. The mirror universe name for humans, after the Latin name of their planet. After the conquest of their once-feared empire by the Klingon-Cardassian alliance sometime after...

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47884
Algorian Mammoth
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A large woolly mammal of this world. Garak once absorbed 30 cc's of an anesthetic that would have knocked out such a beast, according to Bashir.

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Galipotans
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A space-faring race known for its "magnificent sweaters," in Garak's opinion, and a cultural refusal to acknowledge the concept of time — perhaps the reason its freighter is late one day at...

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Obsidian Order
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The Cardassian counterpart to the Romulans' Tal Shiar, the Obsidian Order for decades maintained terror as the secret police and spy agency of that culture. Supposedly subservient to the Central...

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