Frunalians are a humanoid race native to the moon of Orelte, who have several insect-like characteristics. Though it is unclear whether or not the Frunalians are members of the Federation, many do choose to join Starfleet.
The Frunalians are a scientifically-orientated society, but institutionalised ritual still has a place in their society. They also have a deep respect for the physical, emotional metamorphosis that each indivdual undergoes during their adult life. This process is known as "The Shift" and the onset of the metamorphosis varies from person to person. (ST - The Lost Era novel: Serpents Among the Ruins, TOS - Crucible novel: The Fire and the Rose)
Frunalian physiology allows the use of both eyes independently, and the structure of their brain allows them to process both sets of information taken in as well. (ST - The Lost Era novel: Serpents Among the Ruins)
In the 2290s, the Federation began to negotiate with the Frunalians over rights to mine rubindium in their star system. For some time Ambassador Pelfrey attempted to negotiate for the rights, but the Frunalians proved to be rather dificult to negotiate with. When Spock assumed Gregory's place in 2293, he and Alexandra Tremontaine were able to get the Frunalians to agree to the deal, when they threatened that the Federation were ready to pull out of the talks. (TOS - Crucible novel: The Fire and the Rose)
- All of the appearances of and references to the Frunalians in Star Trek literature were in novels by David R. George III. They were first mentioned in "Emissary".