The Haliians are a species from Halii and are Federation members. Externally, they are distinguished by the fact that their foreheads have a slight bulge above each eyebrow. They also have a distinctive crevice between the brows, on the bridge of the nose.
The Haliians are a telepathic species, although they are limited to person to person empathy. A special crystal called a canar has the potential to greatly increase their telepathic abilities and allow them to "bond" with others and share their thoughts.
One of their holidays is the Batarael, at which a traditional song called the Horath is sung.