Tholian
- Appearance: Silicon-based, crystalline
- Faceted form, six arachnid-like legs
- Body filled with swirling gasses
- Different individuals have differing hues of outer body shell (SCE Short Story: "Interphase Book 1")
- Used as basis for caste-based division amongst Tholians (SCE Short Story: "Interphase Book 1")
- Nobility indicated by reddish hue (SCE Short Story: "Interphase Book 1")
- Used as basis for caste-based division amongst Tholians (SCE Short Story: "Interphase Book 1")
- Homeworld: Tholia
- Biology
- Cultural notes
- Tholian language described as "the screech of a tritanium blade on glass" (SCE Short Story: "Interphase Book 1")
- Time measured in "cycles" (SCE Short Story: "Interphase Book 1")
- Foods and drinks