Trill (Species)

The Trill are a humanoid species native to the planet Trill. A small percentage of the Trill population co-exists with a sentient symbiotic organism known as a symbiont inside their bodies. The resulting joined Trill have personalities which are a synthesis of the two beings including the memories, and to some extent the personalities, of the previous hosts of the symbiont. This way, the joined being gains all the skills and occupations of the previous hosts. As late as 2367, the fact that some Trill exist as a joined symbiotic species was widely unknown, even to Federation scientists.
Most Trill are distinguished by two rows of spots going down each side of their body, from forehead to toe. One of the main neurotransmitters in the Trill brain is isoboramine. Joined Trill are also extremely allergic to insect bites; the biochemical connections between the host and symbiont can not tolerate the reaction caused by the insect's venom. One Trill peculiarity is that they are known for having cold hands.
The few Trill that are given a symbiont are typically joined in their early to mid-twenties. The physical process of being joined is irreversible. Once joined, the host and symbiont are dependent on each other after 93 hours. If the symbiont is removed from the host, symbiont and host will die within hours, even if they are otherwise healthy, unless they are reimplanted with another host or symbiont.
The Trill brain had two cerebral nuclei and two different brain wave patterns. Julian Bashir compared them with two linked computers, which both work for the same task in 2369.
*List of Trills
Category:Species Information