Alien species
The Star Trek alien species database is constantly growing and it currently has data about the Borg, Species 8472, Romulans, Klingons, Breen, Ferengi and a whole lot more.
Acamarians
Akaali
Akritirians
Al-Leyan
Alcyones
Aldean
Algolians
Alpha Onias III
Alsaurian
Alsuran
Altorans
Amarie
Amoeba
Anaphasic life-form
Andorians
Angel One
Angusians
Annari
Ansata
Antedeans
Anticans
Antideans
Arbazan
Ardana
Bajorans
Bandi
Baneans
Barash
Benzites
Bolians
Bomar
Borg
Breen
Brekkians
Briori
Bynars
Capellans
Cardassians
Changelings
Craden
Crystalline Entity
Deltans
Devidians
Dominion (more of a group)
Dosi
Drayons
Edo
El-Aurian
Ennis
Fabrini
Ferengi
Gorn
Haakonian
Hekaran
Iiarians
Iyaarans
J'Naii
J'Nani
Jem'Hadar
Kaltons
Kazon
Kellerum
Kes
Kirogen
Klingons
Koinaniars
Kremin
Kriosians
Ktarians
Ligonians
Malcorians
Mari
Milchal Travellers
Mintakans
Mizarian
Mokra
Nasari
Nausicaans
Nazardene
Nezu
Nol-Ennis
Numiri
Nyrians
Ocampan
Pakleds
Prytt
Q (The)
Romulans
Sakari
Sarpeidons
Selay
Sikarians
Skrreea
Species 8472
Suliban
T'Lani
Tak Tak
Takarars
Takarians
Talarian
Talaxian
Talcrians
Talosians
Tamarians (Children of Tama)
Tarellians
Taresia
Tholians
Tilonians
Tosk
Trills
Triskelion
Ullians
Valtese
Veadikons
Ventaxians
Vhnori
Vidiians
Vorgons
Vori
Vorta
Voth
Vulcans
Wadi
Xyrillian
Zahl
Zalkonians
Zetars
