The I'Iglii are a species of intelligent ameoboids.
Physiology
The I'Iglii are amorphous amoeboids capable of sublight travel in space without the aid of spacecraft. Their physical composition can disrupt transporter operations. (FASA RPG module: Star Trek IV Sourcebook Update)
History
Late in the year 2269, the Federation starship USS Enterprise made first contact with the I'Iglii at Deep Space Research Facility 39. (FASA RPG module: The Vanished)