Life of unknown origin

• Life forms with no explicitly specified planet of origin

Animal

• Circassian hellcat (VOY Novel: Mosaic)
  • Vicious and/or short-tempered animal (VOY Novel: Mosaic)
• Jacinnan racing cat (TNG Novel: The Buried Age)
  • Noted for its speed (TNG Novel: The Buried Age)
• Javathian oyster (VAN Novel: Summon the Thunder)
  • Edible by Chelons (VAN Novel: Summon the Thunder)
• Looci hen (VOY Novel: Mosaic)
  • Nesting bird known to Kazon (VOY Novel: Mosaic)
  • Native to Delta Quadrant (VOY Novel: Mosaic)
• Osmotic eel (ENT: "Broken Bow", "Minefield", "Marauders", "Exile", "The Council", "Countdown", "Home")
  • Seemingly consumes microorganisms and parasites in the blood symbiotically, while halting bloodflow, consuming small amounts of blood in the process (ENT: "Broken Bow", "Minefield", "Countdown"; ENT Novel: Uncertain Logic)
• Plorgha (VAN Novel: Reap the Whirlwind)
  • Creature noted idiomatically for sweating (VAN Novel: Reap the Whirlwind)
  • Possibly native to Denobula
• Rintannan (DS9 Novel: Mission Gamma: Twilight)
  • Native to Gamma Quadrant planet (DS9 Novel: Mission Gamma: Twilight)
  • Resembling more rigid, spheroid jellyfish (DS9 Novel: Mission Gamma: Twilight)
  • Communal chameleon predator species, forming larger structures to blend into local landscape (DS9 Novel: Mission Gamma: Twilight)
• Slijm (VAN Novel: Summon the Thunder)
  • Appearing to be a cross between a dog and a walrus (VAN Novel: Summon the Thunder)
  • Covered in blubber coated in smooth, brown fur (VAN Novel: Summon the Thunder)
  • Domesticated (VAN Novel: Summon the Thunder)
  • Possibly from the Zakdorn homeworld (VAN Novel: Summon the Thunder)
• Toskanar dog (VOY Novel: Mosaic)
• Tumodian lamprey (ENT Novel: Uncertain Logic)
  • Feeds on contaminants in blood symbiotically (ENT Novel: Uncertain Logic)
    • Can serve as a natural form of hemodialysis as a result (ENT Novel: Uncertain Logic)
• Vghlar beetle (ENT Novel: Live by the Code)
  • Can serve as natural vitamin supplement for humanoids (ENT Novel: Live by the Code)
• Vicarian razorback (DS9: "The Die is Cast"; DS9 Novel: Avatar, Book Two)
  • Native to a world near Bajoran and Cardassian space
• Yurhaath (ENT Novel: Live by the Code)
  • Bird-like species known to the Hurraait (ENT Novel: Live by the Code)

Plant

• Diomedian scarlet moss (TNG Novel: The Battle of Betazed)
• Draebidium calimus (TNG Novel: The Battle of Betazed)
  • Flower similar to violets (TNG Novel: The Battle of Betazed)
• Leola (VOY)
  • Rare plant found across various Delta Quadrant worlds in vicinity of Talax
  • Root is considered a delicacy among Talaxians, other nearby cultures
• Shendurian stingvine (ENT Novel: Uncertain Logic)
  • Bulbous yellow-green plant seemingly a blend of vine and cactus (ENT Novel: Uncertain Logic)
  • Extremely pungent, sweet aroma (ENT Novel: Uncertain Logic)