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September, 1966
M-113 Creature
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Planet: M-113. The last of a vaguely humanoid species sometimes referred to as the "salt vampire" because of its need for salt and its willingness to kill to satiate its own hunger. The creature...

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Thasians
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Planet: Thasus. An advanced, intelligent, noncorporeal race of beings, first encountered on stardate 1533.6 when they made contact with Captain Kirk to retrieve a young humanoid they had given...

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December, 1966
Romulans
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Planets: Romulus and Remus (aka Romii). Until stardate 1709.2 when the U.S.S. Enterprise NCC-1701 under the command of Captain James T. Kirk had an unfriendly run-in with a Romulan ship. Very...

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January, 1967
Gorn
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Origin: unknown. An intelligent, bipedal reptilian species who fought with Captain Kirk on stardate 3045.6 under the assumption that the Federation was threatening the Gorn claim to the planet...

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Metron
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Planet: Cestus III An extremely advanced humanoid species who intervene in Captain Kirk's battle with the Gorn on stardate 3045.6. Being surprised at the mercy Kirk shows to the Gorn, the Metron...

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Regulan Blood Worm
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Origin: unspecified. This amorphous, pulpous creature rates such a low status to the Klingon people, that name is used to insult people who are thought to be weak. The Klingon, Korax uses this...

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March, 1967
Horta
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The Horta is a highly intelligent, silicon-based species, that is capable of tunneling through solid rock ike humans are able to walk through air. Discovered on the planet Janus IV, the Horta is...

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Organians
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Planet: Organia. On first appearance, a simple agrarian humanoid race that had no significant advancements for over 10,000 years. On stardate 3198.4, the true nature of the Organians revealed an...

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October, 1967
Halkans
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Planet: name unspecified. Both in the mirror universe and in our universe, the Halkans are a humanoid species renowned for their commitment to absolute peace.

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Ornithoids, Extragalatic
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Origin: extragalactic. Slight beings only inches tall, alien to human-type emotions but capable of matter manipulation with a replication/transporter technology dubbed "transmuter" which is used...

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November, 1967
Andorians
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Planet: Andoria. Humanoid Federation members are blue-skinned in appearance, with bilateral antennae that reflect their emotional state, and characteristically white hair. Andorians are...

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Companion, The
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An intelligent entity composed of noncorporeal energy in the forum of a sparkling cloud. It is apparently female gendered, and very inviting when ex-Federation scientist Zefram Cochrane (inventor...

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Orions
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Green-skinned humanoids, the most notable of whom are the so-called "green Orion animal women," females who seem to be mere slaves but actually wield a preternatural influence over humanoid males...

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Tellarites
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Planet: Tellar. A humanoid species distinguished by a porcine-like snout, stout build, deep set eyes and a characteristically irascible disposition. The long-time United Federation of Planets...

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December, 1967
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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Capellans
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Planet: Capella IV. A moderately primitive humanoid society based on tribal leadership and strong codes of war. Led by a high male tier, their customs and traditions forbid shows of cowardice, and...

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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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January, 1968
Amoeba
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Origin: space. A giant single-celled creature which resembles an Earth amoeba but is magnified millions of times. This space-roaming entity threatened to consume all life in the galaxy until it...

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Iotians
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Planet: Sigma Iotia II Highly intelligent and imitative humanoid species who model their social practices after a single Federation book that was left in the Iotian's possession before...

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Providers
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Planet: Triskelion. Members of a species who apparently were humanoid in appearance, but eventually evolved into disembodied brains due to their devotion to intellectual abilities. Three such...

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February, 1968
Ekosians
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Planet: Ekos. A humanoid race at war with a neighboring planet, Zeon. Ekosian society was based on World War II-era Nazi Germany on Earth due to a miscalculation by a Federation cultural observer...

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Kelvans
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Planet: Kelva. Humanoid in appearance, the Kelvans' true appearance remains a mystery and remains unexplained. As refugees of a galaxy poisoned by heavy radiation, the Kelvans have assumed...

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Mugato
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Planet: Tyree's planet An indigenous simian-like beast, carnivorous, with characteristically white fur, a rhino-like horn on the top of its head, and sharp and extremely venomous fangs.

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October, 1968
Medusans
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Planet: Unspecified. A species of highly intelligent noncorporeal beings whose sensory systems differ radically from humanoid sensory systems.  This makes the Medusans particularly well...

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November, 1968
Fabrini
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Planet/Asteroid: Yonada. The Fabrini are an ancient humanoid race whose ancestors built a traveling "world" called Yonada to save their descendants before their sun went supernova.

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Scalosians
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Planet: Scalos. Humanoids who exist in a hyper-accelerated state due to overexposure to radiation.

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December, 1968
Elasians
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Planet: Elas. A fierce humanoid warrior culture at war for years with the neighboring planet of Troyius until both cultures achieved the technology necessary to wipe both themselves and their...

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Vians
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Origin: unspecified. A technologically advanced humanoid race with enlarged cranial cavities, capable of injuring their subjects by magnifying the power of their own thoughts. On stardate 5121.5,...

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March, 1969
Excalbians
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Planet: Excalbia. Sentient rock creatures whose planet is normally a bed of molten lava and deadly to humans. The Excalbians are capable of shape-shifting, and use this ability to experiment on...

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December, 1969
Crystalline Entity
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Origin: space. A massive and unique lifeform, delicate in appearance while blindly and insatiably feeding off the life-force of beings and even planetary resources. It could destroy a world in...

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Megans
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Each person on Megas-Tu is a specialist in a specific kind of magic, and while the satyr-like Lucien says there are no rivals, "generalists" such as himself are branded as troublemakers. The...

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Melkotians
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Origin: Melkotian space. (Also referred to as Melkots, stardate 4385.3), a telepathic species, non-humanoid, which appears as a disembodied head and neck whose eyes are literally two shining...

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Talosians
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Planet: Talos IV Humanoids dependent upon illusion; their civilization was nearly wiped out by war thousands of centuries ago. They are only now beginning to rebuild.

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September, 1973
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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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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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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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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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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October, 1973
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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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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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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November, 1973
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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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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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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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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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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December, 1973
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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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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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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January, 1974
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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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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September, 1974
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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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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October, 1974
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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December, 1979
Deltans
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This usually bald species hails from Delta IV, and is known for being highly developed in the arena of sexuality. In fact, Deltans in Starfleet are required to to take an Oath of Celibacy, so that...

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September, 1987
Bandi
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Planet: Deneb IV. A humanoid culture who applied for entry into the Federation on stardate 41153.7. However, the Bandi were refused Federation membership due to the discovery that the they had...

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Q
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Origin: the Q Continuum. Super-race able to change matter to energy and to suspend time, existing in a continuum of the limitless dimensions of the galaxy.  A dissident once claimed that his...

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October, 1987
Ligonians
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Planet: Ligon II. Well-built, muscular people of dark skin whose culture closely resembles those in feudal Japan and the 13th century Sung Dynasty of China. Ligonians have a highly structured...

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Traveler
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Planet: Tau Alpha C. A single member of a humanoid species, distinguished by a very enlarged cranial size and the ability to "phase." The Traveler is highly advanced and has the capability of...

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November, 1987
Antican
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Planet: Antica One of two quarreling races from the Beta Renna system, Anticans are marked by their canine-like faces, leathery skin and enlarged rear craniums. Although mostly bald, they have...

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Betazoids
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Planet: Betazed A Federation race basically humanoid except for the solid-colored dark pupils and mental power of telepathy within the race. They also have varying empathic links to other races....

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Edo
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Planet: Rubicon III The healthy, blond, skimpily-clad humanoid race believe in complete sexual freedom in a simplistic way and yet are extremely law-abiding, abiding by randomly mobile punishment...

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Selay
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Planet: Beta Renner. Reptiloid race inhabiting one of the two populated worlds of Beta Renner. Tri-digited and of average height, they apparently have a well-developed sense of smell. Their scaly...

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Tarellians
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A humanoid, spacefaring race believed extinct in the aftermath of a plague until a band of eight aboard a small ship showed up at Haven in 2364 seeking an isolated site to take advantage of the...

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January, 1988
Jarada
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Planet: Torona IV. A reclusive, insectoid race barely on terms with the Federation and known for its idiosyncratic attitude toward protocol. Their demand for such precision in greeting, for...

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February, 1988
Aldean
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Planet: Aldea. An ancient humanoid culture considered a myth by outsiders, thanks to a planet-wide shield and cloaking device operated by the age-old computer Custodian, until discovered by the...

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Bynars
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Planet: Bynaus of Beta Magellan. Diminutive, large-craniumed asexual humanoid race with lilac skin. Over time their interconnection with their world's master computer has grown to the point that...

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Velarans
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Planet: Velara III. Microscopic, intelligent one-celled life-forms living in the fragile subsurface saltwater layer of its homeworld. Discovered by a terraforming team that had disrupted their...

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March, 1988
Benzites
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Planet: Benzar. Mostly humanoid race whose members require a special breathing apparatus for oxygen atmospheres. This apparatus is worn on their chest with an extension reaching up to just in...

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Zaldans
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Federation race completely humanoid in appearance save for a webbed membrane between the fingers. As a culture, Zaldans are infuriated by courtesy, viewing it as a form of phony social behavior...

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April, 1988
Armus
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Planet: Vagra II. A unique but destructive life-form resembling a living oil slick but able to alter form into a variety of shapes, including a humanoid-like form and a thin shielding large enough...

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Brekkians
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Planet: Brekka. Basically humanoid, this race is known for a wrinkled nose bridge and a natural generation of a bio-electric charge, usable as a weapon-similar to that of the now-extinct...

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Ornarans
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Planet: Delos III. Basically humanoid, this race was kept in virtual addiction to felicium, a native drug, by the neighboring world of Brekkia supposedly to fight off ongoing effects of a plague...

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May, 1988
Parasite Invaders
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A never-named race of tiny, crustacean-like intelligent beings who attempted to conquer the Federation by infiltrating Starfleet and taking over the bodies of high-ranking officers in 2364, an...

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November, 1988
El-Aurians
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Planet: name unspecified. A humanoid species of "listeners" whose individual life-span can last well over 500 human years. El-Aurians appear to have an awareness that supersedes the normal flow of...

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Nagilum
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Origin: space. A powerful being, extra-dimensional in nature and manifested in space by a large hole of complete blackness.

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January, 1989
Leyrons
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Planet: Malcus IX. A people whose use of a written language predated the spoken word. They are the major known exception to the rule that most cultures develop a sign or gestural language before a...

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Ramatisians
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Planet: Ramatis III. Humanoid inhabitants of a planet off the beaten Federation path, whose ruling family line is missing its gene for hearing, much like the Hanovers of Old Earth who suffered...

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February, 1989
Daledians
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Planet: Daled IV. A race of allasomorphs - shape-shifters with the power of cellular metamorphosis to take on any form desired - who evolved two long-warring camps, one each from the always-day...

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March, 1989
Iconians
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A highly-advanced society that reached its peak just before dying out about 200,000 years ago, based from a homeworld now near the Romulan side of the Neutral Zone. Dubbed by history as...

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April, 1989
Fuurinkazan
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A race targeted in the battle strategies worked out by civilian advisor Kyle Riker at Tokyo Base, before he was invited to be a tactical advisor at Starbase Montgomery.

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May, 1989
Borg
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Origin: Delta Quadrant. A cybernetic life-form thousands of years old which is part organic, part artificial life. They have advanced well beyond Federation science, unknown prior to a...

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Bringloidi
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Planet: Bringloid V (Earth colony) . Simple but lusty descendants of the utopian Neo-Transcendentalists who set out from Earth in 2123 aboard the colony ship S.S. Mariposa during the lingering...

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Dremans
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Planet: Drema IV. Inhabitants of a pre-spacefaring humanoid peoples, whose ignorance of other worlds threatens Data with a Prime Directive violation when he made contact with a small girl there...

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Mariposans
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A cloned race of scientists descended entirely from the five survivors-the "Progenitors"-of a colony ship in the 22nd Century; they abandoned sexual reproduction due to their limited gene pool and...

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June, 1989
Antedean
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Planet: Antide III Ichthyohumanoid species which are fish-like in appearance and have purplish-silver scales. The natives of Antede III have been seen by very few humans. Their preferred method...

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Ooolans
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Inhabitants (pronounced "OO-lons") of Marejaretus VI who give thanks during a meal by eating until two large, continuously struck stones are broken.

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September, 1989
Nanites
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Planet: Kavis Alpha IV. A race of sentient submicroscopic robotic life-forms, created by the Federation, which are recognized as sentient on stardate 43125.8, and given rights to colonize their...

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October, 1989
Douwd
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An immortal race of pure energy, capable of creating disguises and false surroundings by manipulating matter and energy instantaneously-as does the one who took human form on Earth under the name...

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Grizzelas
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An intelligent, hybernating race known to both the Federation and the Sheliak Corporate. Jean-Luc Picard outmaneuvered the hyper-diplomatic Sheliak at their own game when he stipulated that the...

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Husnock, The
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Agressive race of 50 billion warriors of "hideous" intelligence and destruction, destroyed in the blink of an eye by an all-powerful but normally pacifistic Douwd when angered at the death of his...

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Koinonians
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An intelligent people who destroyed themselves after becoming embroiled in a multi-generational war centuries ago, formerly co-existing with a race of compassionate energy beings who were...

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Menthars
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Planet: Orelious IX. An ancient species, now extinct and thought to be both inventive and very resourceful when in battle. Several battle strategies which are still used originated from the...

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