The following is a list of unidentified non-humanoid species observed in the 24th century.

Alien lifeform

Alien creature

An alien lifeform seen on a viewscreen depicting data from the Enterprise-D library computer. (TNG: "The Last Outpost", "Datalore")

Ba'ku animals

Dark matter nebula planet animal

On the coastal regions of this planet, cries of this unseen animal could be heard in the background. (DS9: "Rocks and Shoals")

Many scenes of this episode were shot outdoors in the Sun Valley region near Los Angeles. The noises that could be heard in the audio were actually seagulls.

Ferenginar creatures

Two statues depicting animals could be seen in Ishka's home on Ferenginar. (DS9: "Family Business")

Footprint and cell sample aliens

Footprints and corresponding cell samples of several species were stored in the library computer of the Enterprise-D. Samples of at least five alien species were compared to the footprints and cell sample of the Tarchannen III species prior to its discovery. None of the samples was similar to the Tarchannen III lifeform however. (TNG: "Identity Crisis")

Footprint and cell samples
Footprint sample 1.jpgFootprint sample 2.jpgFootprint sample 3.jpgFootprint sample 4.jpgFootprint sample 5.jpg

Goralis III animals

A wolf-like animal from the Goralis system

While stranded on Goralis III in 2375, Worf killed a large furry mammal, somewhat similar to a wolf, for food. Worf also mentioned the planet having predators that might pose a threat to him. (DS9: "Penumbra")

Horned creature

A horned creature

The stylized image of a possibly reptilian or saurian creature with a unicorn-like horn could be seen on an Alpha Quadrant terrorist communicator and as a badge in use by two Delta Quadrant species, the Mari and the Ledosians. (TNG: "Starship Mine", VOY: "Random Thoughts", "Natural Law")

Larval space creature

A larval space creature

At some point in time, this larval spaceborne species was encountered by the USS Cerritos, and attached itself to the end of the ship's port nacelle. (Star Trek: Lower Decks opening credits)

Moon creature

A Delta Quadrant Mikhal Traveler claimed to have landed on a moon only to have discovered (after sustained moonquakes) that it was actually a creature, a living being so massive it generated its own gravitational field and so immense that it supported its own ecosystem. Another traveler, who had visited the system in 2373, expressed skepticism, as his sensors had not picked up anything like that. (VOY: "Darkling")

New Earth primate

The New Earth primate was an intelligent but non-sentient primate species native to the planet called "New Earth."

Kathryn Janeway attempted to communicate with the primate during her brief stay on the planet in 2372, claiming she sensed intelligence in it. However, Chakotay doubted it could be domesticated. (VOY: "Resolutions")

Alan Sims was responsible for casting this primate. When the script called for an alien primate, Sims found a spider monkey which, on command, could walk on its hind legs with its tail erect. "At first Rick Berman just laughed. He couldn't believe that a spider monkey – which you could find in any zoo – would look convincingly alien. But when I showed him photographs of what the monkey could do, he said, 'That looks alien enough to me. Book him!'" (Star Trek 30 Years, p. 46)

Non-corporeal species

Promenade skeleton

A fish-like skeleton

The skeleton of an animal, possibly fish-like, was displayed on Deep Space 9's promenade. (Star Trek: Deep Space Nine)

Rigel IV aliens

Aliens encountered on Rigel IV

These aliens, encountered on Rigel IV, were displayed on viewscreens depicting data from the Enterprise-D library computer. (TNG: "The Last Outpost", "Datalore")

These drawings are from the Spaceflight Chronology. In the book, these images are presented as drawings of aliens encountered by the first Humans to visit Rigel IV. Only the encounter with the creature on the left was given by the captain in his log. He found the creature somewhat reminiscent of a porcupine. Its tentacles were waving in the air in anger, as a Rigellian jeweler was refusing to sell a large diamond to the creature for the amount it was offering for the jewel

Ruah IV species

Several animal species lived on the landmass of the planet Ruah IV as of 2369. (TNG: "The Chase")

Slug-o-Cola slug

The labels on Slug-o-Cola bottles featured an image of an apparently man-sized, slug-like tentacled creature, gorging on the cola. (DS9: "Profit and Lace")

Soukara lizard

An iguana from the planet Soukara

The Soukaran iguana was a type of lizard native to the jungles of the planet Soukara. (DS9: "Change of Heart")

Soukara mating creatures

These two creatures made mating calls to each other as Jadzia Dax and Worf traversed the jungles of Soukara in 2374. Upon hearing them howl together after calling and responding, Dax mused, "Another happy couple." (DS9: "Change of Heart")

These creatures were only heard off-screen.

Trophy skull

Several skulls which appeared non-humanoid were in evidence on a Hirogen trophy wall in 2374. (VOY: "Hunters")

A large skull was hanging in a net aboard a Hirogen warship in 2374. It was from a lifeform which was previously hunted down by the Hirogen. (VOY: "Prey")

The Waters marine life

A massive eel-like aquatic creature attacks the Delta Flyer at the center of The Waters

This marine lifeform was encountered under the surface of "The Waters" at a depth near 600 kilometers. The creature, which was likened to the electric eel found on Earth, was significantly larger and more powerful that the Earth counterpart, as it emitted biothermic discharges that exceeded 500,000 volts. (VOY: "Thirty Days")

Community content is available under CC-BY-NC unless otherwise noted.