- You may also be looking for the Edo, first featured in the TNG episode "Justice".
- You may also be looking for the Edosian orchid, mentioned in the DS9 episode "Broken Link".
- Star Trek: The Animated Series
- "Beyond the Farthest Star"
- "One of Our Planets Is Missing"
- "The Lorelei Signal"
- "More Tribbles, More Troubles"
- "The Survivor"
- "The Infinite Vulcan"
- "The Magicks of Megas-Tu"
- "Once Upon a Planet"
- "Mudd's Passion"
- "The Terratin Incident"
- "The Time Trap"
- "The Ambergris Element"
- "The Eye of the Beholder"
- "The Pirates of Orion"
- "The Practical Joker"
- "How Sharper Than a Serpent's Tooth"
- "The Counter-Clock Incident"
The name of Arex' 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 StarTrek.com uses information from it.