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This page contains information regarding Star Trek: Lower Decks, and thus may contain spoilers.

For the humanoid species that resembled attractive-looking Humans with blonde hair, please see Edo.

Edosians, or Edoans, were a tripedal species hailing from the planet Edos.


A young Edosian (left)

Edosians had three arms, three legs, and three fingers on each hand. (Star Trek: The Animated Series)

They were susceptible to the Dramia II plague. (TAS: "Albatross")


An Edosian named Arex was a member of the USS Enterprise's crew in 2269-70. (Star Trek: The Animated Series)

An Edosian commanded the Division 14 ship Osler in 2380. (LD: "Much Ado About Boimler")



Background information

The name of Arex's homeworld originated in a non-canon catalog published by Lincoln Enterprises in 1974, which included biographies of Arex and M'Ress. The Edosians were described as a peaceful, long-lived species worshiping many gods. Though the Animated Series may suggest that the Edosians are Federation members, the Lincoln biography claims they are merely in "loose alliance." Despite the information from the biography not being canon, the name of the planet seems to have been accepted in canon, and uses information from it.

Knowledge of the Edosian suckerfish among Humans, as mentioned in "These Are the Voyages...", suggests first contact with Earth, or affiliated species, at a date prior to 2161.


Both Arex and M'Ress appeared in the DC Comics Star Trek title starting with issue #37 of Volume 1, both having been assigned to the USS Enterprise-A.

Arex also appeared in Star Trek Omnibus: The Original Series in the issues Star Trek: Year Four and Star Trek: Year Four - The Enterprise Experiment.

In the Star Trek: Titan novels, Lieutenant Kershu, an Edosian female, serves as a nurse aboard the USS Titan.

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