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Planet of origin: Arcadia
Affiliation: United Federation of Planets (associate member)
Warp capable: Unknown
Classification: Mammalian humanoid
Environmental requirements: Class M conditions
Typical lifespan: 40-60 years
Sexes: Male and Female
Telepathic abilities: None
Blood Coloration: Unknown
Distinctive Features:
Pointed ears and large heads
Racial Sub-divisions:
Varied skin colouration

Arcadians are a humanoid species native to Arcadia, the fifth planet of the Vellun Gamma system.



Arcadians are distinctly known for their large, dolphin-like heads. Their wide-set, gray-blue eyes possess a thin membrane that protects against the solar radiation on Arcadia.

Arcadian skin has a very smooth texture to facilitate movement in the water and has a thick epidermis to protect against sudden temperature changes. The skin also contains chemical compounds that allow some nourishment via photosynthesis. Skin color ranges from light blue to pale yellow.

Offspring are born live and typically measure a half-meter in length. They spend the first three to six months of their life inside a marsupial-like pouch. The young have been observed to adapt easily to both land and water environments and grow to over two meters in height. Although some nourishment is derived from photosynthesis, Arcadians are omnivorous and prefer to live off of the planet's ample supply of sea plankton.

A dorsal spine is a rare physiological feature and plays a part in Arcadian society.

Society and Culture


Cultural development

Arcadian culture has been remarkably free of war as Arcadians are, by nature, pacifistic. The lack of predators on Arcadia has allowed a technological society to develop based on the principles of applied physics and mathematics. However, other scientific disciplines are only now beginning to be understood.

Societal structure

Society is based around extended groupings of like-coloured individuals living in small cities of several hundred to several thousand people. These cities are found on the planet's island chains and on artificial islands capable of moving as the seasons change. Some Federation anthropologists believe that underwater communities may exist as well.

Communal living is the norm in Arcadian communities with all sharing the responsibility and care of any offpsring. Federation sociologists theorize that all Arcadians share some form of communal consciousness citing the speedy assimilation of Federation languages into the Arcadian language without translation assistance as proof.

Arcadian society, as a whole, is slightly xenophobic. Arcadians are fearful that foreign races will cause radical societal upheaval.


Curiously, no evidence of written language exists and the oral language has a very rudimentary baseline.


Government is nonexistent in the traditional sense. The closest appearance of leadership is deference to individuals possessing a rare dorsal spine.

As of 2286, two Arcadians sit among the Federation Council as associate members. Due to their xenophobic society, Federation travel visas are required and trade is restricted by order of the Federation Council.


Arcadian origins are a bit of a mystery. While certain elements indicate a long-established civilization, other elements indicate relatively recent (within the last 100 years) societal development. Some Federation anthropologists hypothesize that the Arcadians are what's left of a long-extinct parent race of unknown origin. Some believe that the race was somehow transplanted to Arcadia, perhaps by the Preservers.

The United Federation of Planets made first contact with Arcadia in 2278. In 2280, Federation scientists were allowed to visit the planet and study its inhabitants.

Sometime between 2280 and 2284, the Arcadian scientist Firim'Ja Ale discovered the first physical evidence of protomatter, the substance behind Dr. David Marcus's Genesis Device.

An Arcadian delegation was present among the Federation Council during the Cetacean probe crisis on Earth and Admiral James T. Kirk's subsequent disciplinary hearing.

With Project Genesis now public, Arcadian ambassadors, feeling morally responsible, are fervently working to ensure history is not repeated. In the process, they are also learning that they must change their xenophobic ways if they are to attain full-membership status in the Federation. (FASA reference: Star Trek IV: The Voyage Home Sourcebook Update)


  • TOS movie: Star Trek IV: The Voyage Home
  • FASA reference: Star Trek IV: The Voyage Home Sourcebook Update

This article uses material from the "Arcadian" article on the Memory-beta wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.


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