Trills

Trills are two distinctive alien races featured in the Star Trek mythos. They were primarily featured in the TV series Star Trek: Deep Space Nine and were represented by characters such as Jadzia Dax and Ezri Dax.

A Trill is comprised of two living organisms who share a symionic existence with one another. The host form is a humanoid characterized by colored spots that run from their temples down the sides of their body; the other form is that of a mollusc-like being that lives inside the humanoid form.

Notes & Trivia

 * Biologically, Trills are similar to the Goa'uld featured in the Stargate franchise.