Legaran

The Legarans are a sapient alien species from the planet Legara IV.

Biology
Legarans live in a hot viscous liquid environment, and feel comfortable at extremely high temperatures, averaging 150º Celsius (= 302º Fahrenheit). Their accommodations aboard the starship USS Enterprise-D were informally described by engineer Geordi La Forge as "a slime pit".

Culture and society
In matters of diplomacy, Legarans are known for their strict adherence to protocol. They believe that negotiations must be conducted in bare rooms, devoid of all kinds of furniture or decoration. Even bright walls might be potentially offensive to them.

History
First contact between Legarans and Vulcans happened at some point prior to 2273. Vulcan ambassador Sarek spent over nine decades building a good relationship with the Legarans, which culminated in the mutually beneficial Federation-Legaran treaty of 2366.

Appearances

 * Star Trek: The Next Generation, s03e23, "Sarek" (1990)