# List of fictional alien species: T
## List of fictional alien species

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
| Name | Source | Notes |
| Taalo | Star Control | The only member of the Sentient Milieu known to inhabit the region of space currently occupied by the New Alliance of Free Stars. They are large, rock-like creatures. The unusual silicon-based physiology of the Taalo did not trigger the instinctual territoriality of the Ur-Quan and the two races became friends, resulting in the entrance of the Ur-Quan into the Sentient Milieu. They were highly advanced technologically, their final creation being the Taalo Shield, created in desperation for their allies as a protection against Dnyarri mind-control. |
| Tachidi | Master of Orion III | |
| Taelons | Gene Roddenberry's Earth: Final Conflict | Humanoid |
| Tagorians | Noon Universe | |
| Takeshi Goda (Parallel Planet on the contrary) | Doraemon | Humanoid who is the gender-swapped version of Takeshi Goda |
| Taiidan | Homeworld | Humanoid |
| Tamako Nobi (Parallel Planet on the contrary) | Doraemon | Humanoid who is the gender-swapped version of Tamako Nobi |
| Tak Tak | Star Trek | |
| Talan | Outcast | |
| Talarian | Star Trek | |
| Talaxian | Star Trek | Humanoid |
| Tallerian | Warhammer 40,000 | |
| Talokians | DC Comics' Legion of Super-Heroes | |
| Talpaedan | Ben 10 | Resembling robotic, bipedal armadillos, these hail from the planet Poiana Lüncas in the Andromeda Galaxy. Their arms have powerful jackhammers, allowing them to punch with extreme power, dig underground rapidly, generate earthquakes, and transform their hands into drills. |
| Talosian | Star Trek | |
| Tamaraneans | Teen Titans | Orange-skinned humanoids from planet Tamaran who are able to unleash ultraviolet blasts called "starbolts" and fly faster than light. Their powers are connected to their emotions, and their society encourages the open expression of emotion. |
| Tamarian | Star Trek | |
| Tanakas | Taro the Space Alien | a blue-face and body humanoid: Taro Tanaka and Hanako Tanaka |
| Tandaran | Star Trek | |
| Tandu | David Brin's Uplift Universe | |
| Tangeans | Buzz Lightyear of Star Command | A humanoid being that can phase through objects and read minds. |
| Tanndai Techknight | Battlelords of the 23rd Century | |
| Tarellian | Star Trek | |
| Tarentatek | Star Wars | |
| Targum | Umor targumskega diplomata | Plantoid |
| Tarkans | Farscape | Humanoid |
| Taronyu | SCP Foundation (Ad Astra Per Aspera canon) | Six-sexed humanoid aliens whose survivors fled their homeworld of Mo'ara due a series of apocalyptic disasters. Since reaching the Solar System in the 2030s and being granted refuge by human and Martian civilizations, the taronyu terraformed and colonized Callisto as their new homeworld, also integrating into communities on Mars and in Luna Korea (a nation of South Korean colonies on the Moon). |
| Tarkas | Sword of the Stars | |
| Tasoth | X-COM: Terror from the Deep | |
| Tatanga | Super Mario Land | Humanoid |
| Tanakas | Taro the Space Alien | a blue-face and body humanoid: Taro Tanaka and Hanako Tanaka |
| Tau | Warhammer 40,000 | Humanoid |
| Tavleks | Farscape | Humanoid |
| Taxxons | K. A. Applegate's Animorphs | Large centipede-like creatures with several big hands and an undying hunger |
| Tc'a | C. J. Cherryh's Chanur novels | |
| Tchoung | Valérian and Laureline | |
| Teacher (Parallel Planet on the contrary) | Doraemon | Humanoid who is the gender-swapped version of the Teacher |
| Technarchy | Marvel Comics | |
| Tecresean | Battlelords of the 23rd Century | |
| Tellarite | Star Trek | |
| Temarkians | Utopia | |
| Tenctonese | Alien Nation | |
| Tenebrian | Hal Clement's Close to Critical | |
| Tentaculat | X-COM: Terror from the Deep | |
| Terileptils | Doctor Who | |
| Terra Novans | Star Trek | |
| Terran | Final Fantasy IX | |
| Terrellian | Star Trek | Humanoid |
| Terrians | Earth 2 | They are humanoid in shape but not in physiology. Their chemical structure is not carbon-based, and they are symbiotic with their planet and able to move through the soil. They communicate with humans through dreams. |
| Tetramand | Ben 10 | Four-armed and four-eyed humanoids from the desert planet Khoros, Tetramands are known for being brutal to outsiders and having harsh punishments for small infractions. While males are far stronger than humans, females are even stronger than the males. |
| Tetraps | Doctor Who | |
| Thalan | Galactic Civilizations II: Dread Lords | |
| Thalians | Star Fleet | They are humanoid in appearance. Due to their mixed appearances, it is unclear if they belong in a definitive race or are many races out of the Thalian Zone after domination from the Imperial Alliance. All have robotic/cybernetic attachments replacing certain parts of their bodies. These range from robotic lobsters/centipedes over one eye to symbiotic talking faces and at least one arm is replaced with a robotic one. |
| Thalonian | Star Trek | |
| Thals | Doctor Who | |
| Than-Thre-Kull | Andromeda | Insectoids |
| Thanagarian | DC Comics | |
| Thargoids | Elite / Captain Kremmen | |
| Thasian | Star Trek | |
| Thep Khufan | Ben 10 | Hailing from planet Anur Khufos, these aliens resemble mummies. Their bandages can extend far distances, and they are thus able to manipulate their bodies immensely, with one bandage being strong enough to deal immense damage to a wooden barn. They can also regenerate rapidly. |
| Therbian (see Aaamazzarite) | Star Trek | |
| Thermians | Galaxy Quest | Humanoid appearance due to holographic cloaking, their true form is octopoidal. Friendly and naive, petitioning for help against oppression. |
| Therons | Dan Dare stories | |
| The Others | The 5th Wave | City-sized alien spaceship. Nickname given by Cassie Sullivan. They created a series of "waves" to wipe out humanity and invade Earth. |
| The Thing | Who Goes There?, The Thing from Another World, and The Thing (including a video game sequel, novelization/comic book series, and a prequel) | Parasites that have the capability to shape-shift, thus imitating its hosts after assimilating them. |
| The Strangers | Knowing | |
| Tholian | Star Trek | |
| Thraddash | Star Control | Rhinoceros-like humanoid |
| Thranx | Alan Dean Foster's Humanx Commonwealth series | |
| Thrint | Larry Niven's Known Space | |
| Thunder | Alienoid | Humanoid |
| Thuranin | Craig Alanson's Expeditionary Force Series | Little green cybernetic humanoids. |
| Tiberians | Buzz Aldrin and John Barnes' Encounter With Tiber | |
| Tidorians | Marcin Mortka's Zagubieni. Inwazja | Humanoids from ice planet Tidoris, with two horns on their heads, gray skin and big black eyes. |
| Tilikanthua | Utopia | |
| Time Lords of Gallifrey | Doctor Who | Humanoid |
| Tines | Vernor Vinge's A Fire Upon the Deep | Dog-like group intelligences |
| Titanians | DC Comics' Legion of Super-Heroes | |
| Titanide | John Varley's Gaea trilogy | |
| Titans | Yoko Tsuno | The nickname comes from the fact that they are gigantic insectoids. They have strong telepathic abilities and need cybernetics to survive on an Earth-like planet. |
| T'Lani | Star Trek | |
| Tleilaxu | Dune universe | |
| Tnuctip | Larry Niven's Known Space | |
| Toclafane | Doctor Who | |
| Togruta | Star Wars | Humanoid |
| Tok'ra | Stargate SG-1 | |
| To'kustar | Ben 10 | To'kustars are a rare species created during cosmic storms. They have the ability to generate beams of cosmic energy and possess massive size and strength. |
| Tollan | Stargate SG-1 | |
| Toluen | Imperium Galactica II: Alliances | |
| Tony | Hetalia | |
| Torians | Galactic Civilizations | |
| To'ul'h | Orion's Arm | |
| Trabe | Star Trek | Humanoid |
| Tractators | Doctor Who | |
| Traeki | David Brin's Uplift Universe | |
| Tralfamadorians | Kurt Vonnegut's The Sirens of Titan and Slaughterhouse 5 | Resembling toilet plungers with hands in which eyes are set, they can see in four dimensions allowing them to see past, present, and future. They believe that when something dies, it continues living in another time and place, leading to their famous saying: "So it goes". |
| Tran | Alan Dean Foster's Icerigger | |
| Transylian | Ben 10 | Cyborg-like aliens hailing from planet Anur Transyl, they greatly resemble Frankenstein's monster, and are equipped with tesla coils on their shoulders. They can manipulate electromagnetic energy this way, allowing them to unleash electrical blasts, control technology, and cling to solid surfaces. |
| Transylvanians | Rocky Horror Picture Show | |
| Transformer | Transformers | |
| Trandoshans | Star Wars | |
| Traskans | Farscape | Humanoid |
| Treecats | David Weber's Honorverse | Six-legged cat-like creatures native to the planet Sphinx in the Manticore System. They are a tool-using race that loves celery. |
| Treens | Dan Dare stories | |
| Tree Trunks' Alien Children | Adventure Time | Tree Trunks and her alien husband's children, they have alien grays' face and Tree Trunks-like bodies |
| Tribble | Star Trek | Compare with the earlier flat cats from Robert A. Heinlein's The Rolling Stones. |
| Triceraton | Teenage Mutant Ninja Turtles | |
| Trilarians | Master of Orion II | |
| Trillions | Nicholas Fisk books | Small collective crystals |
| Trills | Star Trek | |
| Trinocs | Larry Niven's Known Space | |
| Triscene | X-COM: Terror from the Deep | |
| Trolls | Homestuck | Trolls that are characterized by their horns and grey colored skin. Beta Universe Trolls hail from the planet Alternia, while Alpha Universe Trolls hail from the planet Beforus. |
| Tromites | DC Comics' Legion of Super-Heroes | |
| Trytolians | Marcin Mortka's Zagubieni. Inwazja | Reptilian species, that communicate telepathically. They were hostile civilization divided into numerous clans, that would invade and pillage other civilization, taking slaves, and committing genocide on other telepathic species. In 24th century, they had invaded the Solar System. |
| Tryvuulians | Final Space | |
| Tsiongi | Harry Turtledove's Worldwar series | A domestic animal native to Home and kept as pets by the Race. The plural of tsiongi is 'tsiongyu'. Tsiongyu got along well with both Lizards and human beings, but were not as friendly or playful as the beffel, an animal with which the tsiongi tended to fight. Domestic tsiongi is used to help herding zisuili unlike its feral cousins who preyed on the meat animals. It is also known for having a reputation in perversity and pride. |
| Tsufurujin | Dragon Ball | |
| Tunnel Makers | Einstein's Bridge | Aquatic/shape-shifting |
| Tuber | Adventure Time | Cuber's sister |
| Tusken Raider | Star Wars | Humanoid |
| Turians | Mass Effect | A humanoid species with avian features. Militaristic, disciplined. |
| Twinkletoes | Adventure Time: Distant Lands | |
| Twi'lek | Star Wars | Humanoid |
| Twinsunians | Little Big Adventure | |
| Twonkies | The Adventures of Jimmy Neutron: Boy Genius | |
| Tyranid | Warhammer 40,000 | |
| Tzenkethi | Star Trek | |