- Bix
- Dax
- Kahn
- Odan
- Peers
- Tal
- Could live more than a century before first joining with a host
- 550 to 1,000 Years (If joined)
- Joining occurred surgically, placing the symbiont in the host's abdomen;
- It connected neurologically & biologically with the host
- After 93 hours of joining, symbiont & host could not survive long without one another
- Retained the memories of all previous hosts, shared with each new one
- Cared for by Trill Guardians
- Born in pools of white liquid, in underground caverns
- Relied on the Trill to survive through hosts
- Symbiosis Commission oversaw the joining of the symbionts & Trills;
- Implanted only into Trill that had undergone a rigorous testing process
- Population was decimated by The Burn, very few Symbints survived
