A symbiotic lifeform is an organism which closely shares its existence with another species, usually for mutual benefit. A symbiotic lifeform may even merge with its host or symbiont.
Symbiotic lifeforms include:
A symbiotic lifeform invades Enterprise in 2152
- An unnamed host organism which managed to gain access to the Template:ShipClass starship Enterprise in 2152. (ENT: "Vox Sola")
- The magnetic organism found aboard the Insectoid pod ship in orbit of Questar M-17. (TAS: "Beyond the Farthest Star")
- The Ceti eel, indigenous to Ceti Alpha V. (Star Trek II: The Wrath of Khan)
- Neural parasite aliens attempted to infiltrate Starfleet Command in 2364. (TNG: "Conspiracy")
- In 2372, the crew of the USS Voyager encountered a species of orchid that has symbiotic properties. It used its lysosomal enzymes to merge itself during transport at the microcellular level with Lieutenant Tuvok and Neelix, to create Tuvix. (VOY: "Tuvix")