The name for this species comes from the FASAStar Trek IV Sourcebook Update book, however, this information has never been mentioned on-screen. The book describes the Xelatians as a race of cephalopods from the planet Xelata, which is the third planet in the Tau 56 system. They have four-meter long tentacles instead of arms and legs. Xelatians communicate among themselves using telepathy and bio-luminescent pigmentation. To survive on land, they need environmental suits to trap moisture and circulate water through their gill slits. They also need anti-grav harnesses to move about on land. Xelatians wear masks because standard lighting is too bright for them. First contact with the Xelatians was made by the USS Audacious.