Unnamed humanoids ( 22nd century ) These are unidentified humanoid species observed in the 22nd century . ( ) Alien captain . The alien captain commanded the pirate ship that attacked the , a cargo ship captained by Travis Mayweather ' s brother Paul . He demanded that Paul surrender and evacuate the crew . Paul at first said he would give him his cargo but not his ship . The alien captain threatened to destroy the ship . Using the new weapon upgrades that Travis had installed , they were able to cripple the pirate ship . Paul sent a message to the alien captain , that he better think twice before he attacked his ships again . ( ) Alien corpses . These alien corpses were found on a ship raid ed by the Osaarian s in the Orassin distortion field in the Delphic Expanse . ( ) Coalition of Planets dignitaries . These five humanoids attended the Coalition of Planets talks on Earth in 2155 . While there , they witnessed the crimes of John Frederick Paxton and his organization Terra Prime . Among them were a Reptilian ambassador , a female ambassador in a gold dress , a female ambassador with a large forehead , a male ambassador with claws , and a male ambassador with a spiked head . ( ) Enolian prisoners . Three Enolian prisoners were transported on the Enolian transport to the penal colony Canamar in 2152 . One had a cranial ridge on his head , the second one a reptilian look , and the third one was a huge humanoid . The first prisoner wanted to know where they were going when Kuroda Lor - ehn escaped and took over the control of the transport . He was told to be patient . ( ) Great Plume of Agosoria pilgrims . These four alien pilgrim s were aboard Captain Fraddock ' s transport ship in 2151 to witness a protostar that emitted an energy burst every eleven year s , called the Great Plume of Agosoria . They believed that this was the place where the universe began . Aboard they received a tour through engineering and sickbay and had dinner in the mess hall . One of the pilgrims asked Tucker a specific question about the warp drive . ( ) Interspecies Medical Exchange delegates . Various humanoid delegates attended the Interspecies Medical Exchange Conference on the surface of Dekendi III , in 2152 . ( ) Repair station aliens . These aliens were abducted by the automated repair station which used their brain patterns for its computer core . In 2152 , Captain Archer and Sub - commander T ' Pol found the room where they were stored while searching for Ensign Travis Mayweather . Due to the long time they were connected to the station , the away team was unable to rescue them . ( ) Risa visitors . Bistro patrons . Seven humanoids visited a bistro on Risa in 2152 while Hoshi Sato met Ravis and on the following day . They had drinks and meals . ( ) Nightclub visitors . Beside nine Risian s , a member of Sarda ' s species , and a Kaitlen , six humanoid aliens visited a nightclub on Risa in early 2152 at the same time Malcolm Reed and visited the bar . ( ) " Shroomies " . A biped al species , from an unknown star system . This species and their technology were unknown even to the Vulcan database . They chased in September 2151 , and did not respond to hail s . Then they returned several other times , causing significant damage . During one attack , this species activated a dampening field , while two of its crew boarded " Enterprise " . They were fired at by Captain Archer , but a phase - pistol he carried had no effect and they soon left . ( ) Background information . No physical description of these lifeforms was scripted , other than the fact they were obviously meant to be alien . They were also not given any particular name in the final draft script of . This species was physically designed by Dan Curry . John Teska , who built the CGI model s of the aliens for " Silent Enemy " , referred to them as " Shroomies " after their mushroom - shaped heads . Other members of the art department , such as Doug Drexler , also used this name . Teska commented , " " Some fans out there must know the name of the mysterious aliens from ' Silent Enemy ' , but I ' ll only know them as ‘ the Shroomies ' . " " ( ) " Silent Enemy " writer André Bormanis devised these aliens as highly enigmatic to portray his belief that , in reality , Humans would most likely encounter extreme difficulty in establishing communication with extraterrestrials and understanding their motives . ( " Silent Enemy " audio commentary , ENT Season 1 Blu - ray ) Bormanis revealed , " " I wondered whether they might be Romulan s until we decided to do a CGI alien effect . " " He considered that they were not established as Romulans mainly because their technology seemed too advanced for that of 22nd - century Romulans . The idea that the newly - devised aliens would spy on the crew of " Enterprise " was , said Bormanis , " included to make it clear that , you know , these aliens are really , really insidious . " ( " Silent Enemy " audio commentary , ENT Season 1 Blu - ray ) The visual effects artists of first learned about the species from the script for " Silent Enemy " . " " Following the lead in André ' s script , " " said Dan Curry , " " we [ . . . ] talked about the alien . " " The decision that the aliens would be depicted with CGI impacted on considerations such as time and budgetary restrictions . Bormanis recalled that " with respect to the CGI aliens , " thought had to be given to questions such as , " " How much time can we actually spend with these guys ? How many scenes can we have them in ? " " The answer was , Bormanis stated , " " Probably not more than , I don ' t know , twenty - five or thirty seconds , which , in a way , is a good thing . It ' s an advantage because it keeps the suspense , I think , at a higher level when you can ' t see the monster , you know , as often or as soon , so we can hold it back and build some dramatic tension that way . " " ( " Silent Enemy " audio commentary , ENT Season 1 Blu - ray ) Dan Curry began generating concept artwork for the aliens . The availability of CGI allowed the team freedom to avoid designing them as Human actors in suits . " " We wanted to do something that couldn ' t possibly be a person in a suit , to enhance its alienness , " " Dan Curry explained . " " And so , when I decided to sit down and sketch out the creatures , it certainly needed humanoid means of conveying itself . " " Thus , the creatures were made bipedal . " " To make it look strange , " " Curry further elucidated , " " we wanted to give it a vertical mouth and with kind of crenelated ribbing ridges around it and wanted to give it a different technology [ . . . ] We wanted them to have proper , high - tech - looking clothes that are higher tech than ours , and that they wouldn ' t necessarily conveniently breath our atmosphere . So , I thought it would be cool to give them space helmets [ . . . ] [ that ] were force fields rather than physical space helmets [ . . . ] I think I was inspired by the roof of the mouth of a hippopotamus for the surface texture of these creatures . " " ( " Silent Enemy " audio commentary , ENT Season 1 Blu - ray ) Curry also said of the aliens , " " I wanted their skin to be somewhat transparent , like those fish where you can see their internal organs . " " ( ) Devising the appearance of the aliens meanwhile remained a collaborative effort . Dan Curry continued , " " Of course , we would show the sketches to Rick Berman and Peter Lauritson and the other producers and André , and see how our designs were working with their vision , and they would of course have feedback . And so , it was a collective project to shape it into what the final version would be . " " ( " Silent Enemy " audio commentary , ENT Season 1 Blu - ray ) Recalling another collaborator , Dan Curry noted , " " I worked with John Teska up at Foundation Imaging . " " ( ) Teska himself remembered , " " I recall Dan Curry brought these sketches and we discussed ways to make their appearance and actions non - human – there should be no mistaking them for actors in costume . I had fun fleshing them out in 3D from the pencil drawings . The skin surface had layers of organic texture as if their heads were filled with organs . You probably would not enjoy eating dinner with one if you were invited … which is very rare indeed . " " Teska took notice of Curry ' s concept that the aliens would have transparent skin . " " John did a great job in creating a creature like that , " " Curry remarked , " " where it ' s almost like a jellyfish on the outside and you can see the nerves under the skin . " " ( ) When it came to animating the aliens , it was decided that they should be shown to walk in a different way from how Humans walk . The CGI aliens also had to seem as if they fit naturally into their environments . Remembered Dan Curry , " " We made sure that they would cast shadows on the physical set , so that you buy that they ' re there . " " ( " Silent Enemy " audio commentary , ENT Season 1 Blu - ray ) Dan Curry thought the aliens were a success in general , relating , " " I was very happy with those . " " ( ) He regarded the aliens as " a testament to the wonderful artistry of " John Teska and his colleagues at Foundation . Curry was particularly pleased with the lighting of the aliens , saying , " " If you look at how beautifully the creatures are lit , [ . . . ] they feel like they are in that environment . " " ( " Silent Enemy " audio commentary , ENT Season 1 Blu - ray ) Similarly , John Teska appreciatively described the aliens as " lovely bulbous - headed beauties . " ( ) André Bormanis said , " " I couldn ' t have been more thrilled with the creatures . " " He especially approved of how realistic they were . " " That ' s what ' s great about these guys , is they ' re creepy and mysterious but they are believable , " " he observed . " " You can believe that this is something that evolution could produce . " " ( " Silent Enemy " audio commentary , ENT Season 1 Blu - ray ) The conjecturally identified this species as the Kovaalan s " " based on the fact that the alien ship in was a digital reuse of the digital model in " Silent Enemy " . " " Apocrypha . The novel " A Choice of Futures " interprets the Shroomies as the mute inhabitants of Gamma Vertis IV mentioned in . They are referred to as Mutes and Vertians . In " Star Trek Online " , this species – called the " Elachi " – play a large role in the Romulan Republic storyline . They are also shown to use identical dimension - gate effects as the solanogen - based lifeform s encountered in , however , they are only shown to be related in the fact that both races are " servitors " to the Iconians . Trellium mines . Foreman . The foreman ran a trellium mine in the Delphic Expanse . He had heavy ridges above and around his eye s . Many blemishes – including pustules and ill - healing gashes – were on his head , which also had patches of fair - colored hair protruding from the scalp . The foreman used an inhaler to breathe , but had a persistent wheeze and an occasional cough . While Jonathan Archer was interested in interrogating a Xindi named Kessick working at the mine , the alien foreman demanded a half - liter of platinum in return . Because Archer wanted assurances that Kessick was a Xindi , the foreman gave him Kessick ' s finger , which the foreman had cut off . His mining colony was manned by forced labor and he tried to delay the Human s long enough for his warships to arrive , capture " Enterprise " s crew and use them as slave labor in the mine . After Archer failed in an attempt to rescue the Xindi male , the foreman ordered that Archer , Tucker and Kessick be killed . During a subsequent Starfleet rescue attempt ( which resulted in Archer and Tucker being saved ) , the foreman managed to kill Kessick . However , the foreman was in turn killed by a MACO , R . Ryan . ( ) Background information . The foreman was played by actor Stephen McHattie . The final draft script for " The Xindi " described the foreman as " a wiry , creepy - looking man " with " a raspy voice . " Although it is only implied in the episode that the foreman ' s breathing problems are due to damage to his lungs , the script confirmed this probability by stating , " " His lungs have been ruined by the toxic mines , and we can hear a subtle rasping sound when he breathes . " " In ultimately omitted dialogue from the same script , the foreman offered Archer and Tucker food , while they waited to speak to Kessick , as the Foreman was actually trying to delay the newcomers . In reality , the special effects make - up created for his part involved a face - covering mask , which covered the nose though not the lower portions of the face , as well as a skullcap which extended around the back of the neck . The prosthetic was colored with a tan - flesh tone and had a supple feel . The make - up appliance was sold off on the It ' s A Wrap ! sale and auction . The costume for the Foreman was also sold at the same auction . The novelization of and " The Xindi " ( entitled " " ) gives the Foreman ' s name as Baloran . Head guard . The alien head guard was under the command of the alien foreman who ran a trellium mine in the Delphic Expanse . When Jonathan Archer tried to free a Xindi named Kessick , the guard captured them . He was ordered to take them to the surface and kill them . He was killed by the MACOs who rescued Archer . ( ) Mine guards . These mine guards were under the command of the head guard at a trellium mine in the Delphic Expanse . These aliens guarded Archer , Tucker , Kessick and the other slave miners until they were overwhelmed by a group of MACOs under the command of Major J . Hayes . ( ) Slave miners . These aliens were kept as slave miner s in the trellium mine in the northern part of a trellium mining planet . They were encountered by Captain Jonathan Archer and Commander Tucker during their search for the Xindi Kessick . ( ) Xantoras victims . These aliens were the victims of an attack by the new Xantoras government . ( )