Unnamed non - humanoids ( 24th century ) The following is a list of unidentified non - humanoid species observed in the 24th century . Alien lifeform . An alien lifeform seen on a viewscreen depicting data from the " Enterprise " - D library computer . ( ) Aquatic lifeforms . A table with an evolutionary diagram of various alien aquatic lifeforms was displayed in the classroom s aboard the and on Deep Space 9 . Some of the lifeform s were very fish - like while others looked distinctively mammal ian and saurian . ( ) Banea artificial lifeform . The Banea used an artificial lifeform as a host for implanting memory engram s in the minds of convicted murder ers . This was part of a punishment which caused the perpetrator to periodically relive the event from the point of view of the victim . ( ) Dark matter nebula planet animal . On the coastal regions of this planet , cries of this unseen animal could be heard in the background . ( ) Ferenginar creatures . Two statue s depicting animals could be seen in Ishka ' s home on Ferenginar . ( ) 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 . ( ) Goralis III animals . 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 predator s that might pose a threat to him . ( ) 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 Ledosian s . ( , ) Moon creature . A Delta Quadrant Mikhal Traveler claimed to have landed on a moon only to have discovered ( after sustained moonquake s ) 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 scepticism , as his sensors had not picked up anything like that . ( ) 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 . ( ) Non - corporeal DS9 visitors . These unnamed non - corporeal aliens were powerful aliens on an extended mission exploring the galaxy who visited Deep Space 9 in 2369 , after following a ship through the " hole in space " . They observed the Deep Space 9 inhabitants for a while and then started making their imagination real to explore the concept , calling it unique . They took the forms of characters familiar to the crew , like Rumpelstiltskin , Buck Bokai , and Jadzia Dax . ( ) Matrix species . When Kathryn Janeway struggled for her life after a shuttle crash in 2373 , The Doctor treating her detected an alien presence in her Cerebral cortex . This alien was causing Janeway hallucination s , in which he tried to convince her that she had already died , and needed to let go and cross over in an afterlife called the matrix . To achieve this , he posed as Janeway ' s deceased father , and claimed it to be a place of joy and wonder . Janeway was skeptical , and eventually managed to have him reveal that this is what his species did , and ultimately that he wanted her to go into the matrix so she could provide him with nourishment . With her firmly refusing to cross into the matrix , the alien became " dislodged " . However , the alien promised he ' d wait for her and she ' d see him again when she finally died . After the event , Janeway was left with questions about if his realm was indeed some type of afterlife , if this event species accounted for near - death experience s , and if the species was confined to the Delta Quadrant . On the latter question , Chakotay was convinced he must be . ( ) Promenade skeleton . The skeleton of an animal , possibly fish - like , was displayed on Deep Space 9 ' s promenade . ( ) Rigel IV aliens . These aliens , encountered on Rigel IV , were displayed on viewscreens depicting data from the " Enterprise " - D library computer . ( ) Ruah IV species . Several animal species lived on the landmass of the planet Ruah IV as of 2369 . ( ) Slug - o - Cola slug . The label of Slug - o - Cola bottles featured an image of an apparently man - sized , slug - like tentacled creature , gorging on the cola . ( ) Soukara mating creatures . These two creatures made mating call s to each other as Jadzia Dax and Worf traversed the jungle s of Soukara in 2374 . Upon hearing them howl together after calling and responding , Dax mused , " " Another happy couple . " " ( ) Trophy skull . Several skulls which appeared non - humanoid were in evidence on a Hirogen trophy wall in 2374 . ( ) 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 . ( )