Andorian
- Appearance: Mammalian; dark- to pale-blue skin, white hair, two antennae
- Three major races
- Thalassan: High, knobby antennae from back of the skull (ENT Novel: Live by the Code; Among the Clans)
- Talish: Forward, tendril-like antennae from high on the forehead (ENT Novel: Live by the Code; Among the Clans)
- Bish'ee: High, knobby antennae from high on the forehead (Among the Clans)
- Three major races
- Homeworld: Andor
- Major offworld populations: Alrond, Threllvia IV, Weytahn
- Biological notes
- Cobalt-based blood
- Average body temperature higher than that of Benzites (TNG Novel: A Time to Harvest)
- Four genders: Chan, Thaan, Zhen, Shen
- Shen source of gametes, chan and thaan contribute genetic material, zhen carries to term in pouch on their back
- Mated foursome known as a shelthreth, or bondgroup (ENT Novel: The Good That Men Do)
- Successful reproduction from at least 22nd century onwards requires careful genetic compatibility due to unstated damage to the Andorian genome in this era
- Antennae provide sensation of electromagnetic fields, including bioelectric fields of nearby life (ENT Novel: The Good That Men Do, Live by the Code; DS9 Novel: Avatar, Book One)
- Mobile, responsive to emotional state (ENT Novel: The Good That Men Do, A Choice of Futures)
- Able to pick up on emotional states of other Andorians as well (ENT Novel: Live by the Code)
- Andorian technology often uses magnetic signals alongside visual akin to alert lights (ENT Novel: Live by the Code)
- Andorians require about 4 hours of sleep a night (DS9 Novel: Avatar, Book One)
- Andorian response to teptaline grants heightened focus and concentration, triggering a "fight-or-focus" reaction (DS9 Novel: Avatar, Book One, Avatar, Book One)
- Teptaline an Andorian analogue to adrenaline (DS9 Novel: Avatar, Book One)
- DS9 Relaunch works implied Andorians to be native to tropical climate; invalidated by later Enterprise appearances, maintained for completion's sake
- 22 degrees Celsius, 18% humidity considered "cold and dry by Andorian standards" (DS9 Novel: Avatar, Book One)
- Aenar a telepathic subspecies formerly native to Andor's Northern Wastes (ENT: "The Aenar")
- Cultural notes
- Andorian calendar
- Andorian faith
- Andorian language
- Andorian food
- Imperial andorian surnames start with gender prefix (ch', th', zh', sh') followed by clan names
- Andorian formerly heavily clan based
- Asking for another's opinion without providing one's own is considered a sign of respect (DS9 Novel: Avatar, Book One)
- Generally aggressive culture (DS9 Novel: Avatar, Book Two)
- Quick to anger, long memory for both offenses and favors (ENT)
- Incredibly structured, serious in compensation (DS9 Novel: Avatar, Book Two)
- Humor, public expressions of pleasure rare (DS9 Novel: Avatar, Book Two)
- Smiling a learned behavior when interacting with cultures which use the act (DS9 Novel: Avatar, Book Two)
- Humor, public expressions of pleasure rare (DS9 Novel: Avatar, Book Two)
- Ushaan
- Ritual combat to provide for relief of violent instincts following extreme wrongs (ENT: "United")
- Fought with handheld ice-cutters known as ushaan-tors (ENT: "United")
- Common tool in Andorian civilization, easily available (ENT: "United")
- Blue a signifier of danger in Andorian culture (ENT Novel: Live by the Code)
- Musical instruments
- Flabbjellah (ENT Novel: Live by the Code)
- Also functions as a throwing club (ENT Novel: Live by the Code)
- Zharen'tara (ENT Novel: The Good That Men Do)
- Stringed instrument (ENT Novel: The Good That Men Do)
- Flabbjellah (ENT Novel: Live by the Code)