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

An alien creature
An alien lifeform was seen on a viewscreen depicting data from the USS Enterprise-D's library computer. (TNG: "The Last Outpost", "Datalore")
Ba'ku animals[]
- See: 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")
Desert planet predator []

A ravenous animal
While stranded on a desert planet in 2381, Ensigns Brad Boimler and Beckett Mariner were charged by a large animal whose body was impervious to phaser fire. Mariner and Boimler were able to shelter themselves from the creature inside the shuttlecraft Yosemite, though it devoured their emergency rations. (LD: "Where Pleasant Fountains Lie") Later that year, a creature of this type was present in a display at Narj's Miraculous Menagerarium. (LD: "I Have No Bones Yet I Must Flee")
Dilmer III animals[]
Fish-like creature []
This taxidermied fish-like creature was seen mounted on a plaque in the attic of an abandoned house on Dilmer III. This creature possessed orange skin and horns, much like the planet's sentient inhabitants. (LD: "Fully Dilated")
Horse-like creature []
The inhabitants of Dilmer III utilized horse-like creatures as draft animals. Like the Dilmerians themselves, these creatures possessed green manes and orange horns. (LD: "Fully Dilated")
Ferenginar creatures[]
Two statues depicting animals could be seen in Ishka's home on Ferenginar. (DS9: "Family Business")
Flying turtle-like creature []
A species of creature resembling a flying, feathered turtle was present on both Dulaine and Areolus in 2381. Its members had four wings on their bodies, rather than legs. (LD: "The Least Dangerous Game", "A Mathematically Perfect Redemption") That same year, a number of these creatures were present in a display at Narj's Miraculous Menagerarium. (LD: "I Have No Bones Yet I Must Flee")
Foot-eating creature[]

Foot-eating creature
This creature seemed to feed on the feet of humanoids, as it did to an officer aboard the USS Cerritos in 2381.
Before Doctor T'Ana cut off her patient's foot with a chainsaw, the foot-eating creature was already in the process of digesting his toes. (LD: "Mining The Mind's Mines")
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 Tarchanne prior to its discovery. None of the samples was similar to the Tarchannen III lifeform however. (TNG: "Identity Crisis")
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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")
Grasshopper-like creature[]

a grasshopper-like creature
While on a mission of exploration to the surface of a planet with the rest of the crew of a Medusan vessel, Zero encountered this lizard-like animal that hopped around like a grasshopper. It turned to look at them, and it apparently didn't experience the ill effects that most species did when looking upon a Medusan; it is possible there wasn't enough time for the creature to go insane, because it was immediately eaten by a multi-legged creature that was camouflaged as a rock. (PRO: "Preludes")
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 used by two Delta Quadrant species: the Mari and the Ledosians. (TNG: "Starship Mine"; VOY: "Random Thoughts", "Natural Law")
Hysperian dragon []
The planet Hysperia was home to creatures resembling dragons from Earth mythology, which some Hysperians, including Andy Billups, kept as pets. One such creature was also present on Queen Paolana's cruiser, the Monaveen. (LD: "Where Pleasant Fountains Lie", "Shades of Green")
Lamprey-like creature []
In 2382, during a series of tests to determine her own pain tolerance, Dr. T'Ana utilized several lamprey-like creatures, which she had Nurse Westlake put in a helmet-like device she was wearing. (LD: "Upper Decks")
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 that 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")
Multi-legged predator[]

A multi-legged predator
This multi-legged creature was able to camouflage itself to look like a rock, in order to blend into its surroundings and catch its prey off-guard. This was what happened to a grasshopper-like lizard that Zero encountered while they were exploring an alien world. (PRO: "Preludes")
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, Janeway first encountered the animal while sitting in the bath Chakotay made for her, and once more while collecting insect samples from her traps, it even warned Janeway about a incoming dangerous ion storm even though Janeway first thought it was looking at her insect traps (VOY: "Resolutions")
Non-corporeal species[]
Preserved creatures[]
(PRO: "A Tribble Called Quest")
Rat-like creature[]
In 2381, a small, rat-like creature was seen scurrying across a cable leading to a lift at the Orion Pirate Outpost. (LD: "We'll Always Have Tom Paris")
Rhino-like creature[]

Rhino-like creature
This rhinoceros-like creature was native to the planet Orion. (LD: "Something Borrowed, Something Green")
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")
Ruah IV species[]
Several animal species lived on the landmass of the planet Ruah IV as of 2369. (TNG: "The Chase")
Slug-like creature[]

A giant slug attacking Tendi
While performing anomaly consolidation duty aboard the Cerritos in 2381, Ensign D'Vana Tendi accidentally knocked over a storage canister, releasing a large, gelatinous slug-like creature that promptly devoured her. Although Ensigns Beckett Mariner and Sam Rutherford managed to save their crew member and shrink the creature with a hypospray injection, Tendi was still quite traumatized from the ordeal. (LD: "The Spy Humongous")
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")
Trophy skulls[]
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 ship in 2374. It was from a lifeform which was previously hunted down by the Hirogen. (VOY: "Prey")