Tagrans
Tak Tak
Takarans
Takarians
Talarian Hook Spider
Talarians
Talavians
Talaxians
Talosians
Tamarians
Tanugans
Tarchannen Parasites
Tarchee Cat
Tarellians
Taresians
Targ
Targhee Moonbeast
Tarkalean Condor
Tarkalian Field Mouse
Tarkalean Hawk
Tarkannans
Tarkassian Razorbeast
Tarlac
Tavnians
Tellarites
Terellians
Terkellians
Terrellians
Thasians
Tholians
Tiberian Bats
Tiger
Tika Cat
T'Lani
Torga
Tosk
Trabe
Traveler
Trayken Beast
Trelane
Trellan Crocodile
Trianic Energy Beings
Tribble
Trill
Trill Host
Trill Symbiont
Troglytes
T-Rogorans
Troi, Ian Andrew
Troyians
Tsetse Fly
T'stayan
Tube Grubs
Turei
Two-Dimensional Creatures
Two-Headed Malgorian
Tyrus
Tzenkethi
Tagans
Tandarans
Tallonians
Tarahongians
Teldarians
Tellurians
Teplans
Trunkheads aliens
Tygarians
Telsians
Ti'tu ah sanoo portan ee'purana sooo ta-so yo' armat prefan rickarta ach'som
Tiburon
Tilonus
Torothans
Tarkalean
Triannon
Telepathic Alien (Exile)