Ferengi
- Appearance: Mammalian
- Orange to bronze skin
- Large skull with prominent brow ridge
- Visibly hairless
- Large ears
- Male ears much larger than female
- Averaging around four feet tall
- Homeworld: Ferenginar
- Major offworld populations: Throughout the Ferengi Alliance
- Biological notes
- Distantly related to Dopterians (DS9: "The Forsaken")
- Four-lobed brain structure (TNG: "Menage a Troi"; DS9 Novel: The 34th Rule)
- Results in resistance to many, but not all, forms of telepathy (TNG: "Menage a Troi", "The Loss"; DS9: "The Forsaken")
- Incredibly sensitive hearing
- Frequency response range much wider than most humanoid species (DS9 Novel: The 34th Rule)
- Cultural notes
- Ferengi faith
- Ferengi language
- Ferengi food
- Society largely based on extreme capitalism directed and (minimally) regulated by the Alliance
- General laissez-faire approach to capitalistic endeavors
- Those who don't operate under a capitalistic framework known as "val-effs", or "value frauds" (DS9 Novel: The 34th Rule)
- Especially applies to the Federation or other socialistic, currency-free economies (DS9 Novel: The 34th Rule)
- Society and business both guided by the Rules of Acquisition
- Coming of age traditions
- At about age 18, following the completion of their Attainment Ceremony, Ferengi males are expected to purchase an apprenticeship from a suitable role model (DS9: "Heart of Stone")
- Following the completion of their apprenticeship, they sell off all childhood possessions to obtain a starting stake in business (DS9: "Little Green Men"; SCE Short Story: "Caveat Emptor")
- Coming of age traditions likely apply to Ferengi female children as well following planetary reforms of 2375
- Common sayings
- "Ears open, eyes wide" (DS9 Novel: The 34th Rule)
- Be wary about trusting customers (DS9 Novel: The 34th Rule)
- "Ears open, eyes wide" (DS9 Novel: The 34th Rule)