List of fictional alien species: T
From Infogalactic: the planetary knowledge core
| 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. |
| Taelons | Gene Roddenberry's Earth: Final Conflict | Humanoid |
| Tachidi | Master of Orion III | |
| Tagorians | Noon Universe | |
| Taiidan | Homeworld | Humanoid |
| Tak Tak | Star Trek | |
| Talan | Outcast | |
| Talarian | Star Trek | |
| Talaxian | Star Trek | Humanoid |
| Tallerian | Warhammer 40,000 | |
| Talokians | DC Comics' Legion of Super-Heroes | |
| Talosian | Star Trek | |
| Tamaraneans | Teen Titans | Humanoid |
| Tamarian | Star Trek | |
| 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 |
| Tarkas | Sword of the Stars | |
| Tasoth | X-COM: Terror from the Deep | |
| Tatanga | Super Mario Land | Humanoid |
| Tau | Warhammer 40,000 | Humanoid |
| Tavleks | Farscape | Humanoid |
| Taxxons | K. A. Applegate's Animorphs | Large centipede-like creatures, they have several bug hands and an undying hunger. |
| Tc'a | C. J. Cherryh's Chanur novels | |
| Tchoung | Valérian and Laureline | |
| 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 | |
| Terellian | Star Trek | Humanoid |
| Terileptils | Doctor Who | |
| Terran | Final Fantasy IX | |
| Terra Novans | Star Trek | |
| Terrelian | Star Trek | Humanoid |
| 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 | |
| Tetraps | Doctor Who | |
| Thals | 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 | |
| Than-Thre-Kull | Andromeda | Insectoids |
| Thanagarian | DC Comics | |
| Thargoids | Elite / Captain Kremmen | |
| Thasian | Star Trek | |
| 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. |
| Therbian (See Aaamazzarite) | Star Trek | |
| Thep Khufan | Ben 10 | |
| Theron | Dan Dare stories | |
| Tholian | Star Trek | |
| Thraddash | Star Control | Rhinoceros-like humanoid |
| Thranx | Alan Dean Foster's Humanx Commonwealth series | |
| Thrint | Larry Niven's Known Space | |
| Tiberians | Buzz Aldrin and John Barnes' Encounter With Tiber | |
| Tilikanthua | Utopia | |
| Time Lords of Gallifrey | Doctor Who | Humanoid |
| Tines | Vernor Vinge's "A Fire Upon the Deep" | Dog-like group intelligences |
| "Titans" | Yoko Tsuno | The nickname comes from the fact that they're gigantic insectoids. They have strong telepathic abilities and need cybernetics to survive on an Earth-like planet. |
| Titanians | DC Comics Legion of Super-Heroes | |
| Titanide | John Varley's Gaea-trilogy | |
| T'Lani | Star Trek | |
| Tleilaxu | Dune universe | |
| Tnuctip | Larry Niven's Known Space | |
| Toclafane | Doctor Who | |
| Tok'ra | Stargate SG-1 | |
| To'kustar | Ben 10 | This species is created during cosmic storms. |
| 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 | |
| Tran | Alan Dean Foster's Icerigger | |
| Benvicktor | Ben 10 | |
| Transylvanians | Rocky Horror Picture Show | |
| Transformer | Transformers | |
| Trandoshans | Star Wars | |
| Traskans | Farscape | Humanoid |
| Treecats | David Weber's Honorverse | A 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 | |
| Tribble | Star Trek | Compare with the earlier flat cats from Robert A. Heinlein's The Rolling Stones. |
| Triceraton | Teenage Mutant Ninja Turtles | |
| Triscene | X-COM: Terror from the Deep | |
| Trilarians | Master of Orion II | |
| Trills | Star Trek | |
| Trillions | Nicholas Fisk | Small collective crystals |
| Trinocs | Larry Niven's Known Space | |
| 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 | |
| Tsufurujin | Dragon Ball | |
| Tunnel Makers | Einstein's Bridge | Aquatic/Shape shifting |
| Tusken Raider | Star Wars | Humanoid |
| Turians | Mass Effect | |
| Twi'lek | Star Wars | Humanoid |
| Twinsunians | Little Big Adventure | |
| Twonkies | The Adventures of Jimmy Neutron: Boy Genius | |
| Tyranid | Warhammer 40,000 | |
| Tzenkethi | Star Trek |
