Xindi - Reptilian The Xindi - Reptilians were a member of the multi - species Xindi race . They were easily the most aggressive of the six species , which shared a genetic ancestry . Physiology . Xindi - Reptilian faces were scaly and highly textured , including many small wrinkles and ridges . The Reptilians had yellow to brown - colored scales with multiple spikes coming out of their heads and little tusks , one on either side of the face , protruding from close to the mouth . They had yellow eyes with slitted vertical pupils , and were cold blood ed . Like other Xindi , they had a characteristic facial feature , involving a small indentation and a series of little bumps on their cheek bones . ( , " et al . " ) Reptilians ' brains had neural pathway s that were virtually identical to those of Xindi - Primate brains . ( ) Xindi - Reptilians were also stronger and had greater stamina than Human s . For example , they were not affected by phase - pistol s set on stun and survived direct hits from MACO particle weapon s without suffering any immediately noticeable ill effects from such weapons , apart from being pushed slightly back . ( ) Reptilians were carnivorous . Living food , like small rodent - like creatures , were part of their diet . ( ) Philosophy . Reptilians were perceived as being untrustworthy and impatient by the other Xindi species . ( ) A common Reptilian saying was " " Patience is for the dead . " " Nevertheless , the Reptilians were usually the first choice for when force was needed . ( ) With their easily provoked and opinionated nature , Xindi - Insectoid s often sided with the Reptilians on certain issues . ( , et al . ) They sometimes even shared ships with each other . Reptilian soldiers were surgically implanted with a " suicide gland " that secreted a neurotoxin if they were captured . ( ) The Reptilians were the species of Xindi that seemed to be most interested in destroying the planet Earth . The Reptilians lived out a militaristic lifestyle and hoped to ultimately rule over all the other species of Xindi . ( ) Reptilians preferred to be on or near the ground as opposed to up in the air . ( ) Technology . Reptilian weapon s , such as biorifle s and seeker s , used techno - larva e . Their biorifles worked on a rotating modulation that self - destructed when accessed by other species . ( ) Reptilians additionally used organic grenade s fired from a grenade launcher which could be attached to a bio - rifle ( see Xindi technology ) . ( ) The Reptilians also used thermal chamber s on board their ships , due to their cold - blooded metabolisms . ( ) Commander Dolim was the Reptilian representative on the Xindi Council until 2154 . ( ) Appendices . Background information . Makeup . Of all the Xindi , the Reptilians were meant to look especially different from other aliens on . Regarding the intentions for the Reptilians , Makeup Supervisor Michael Westmore noted , " " [ It ] wouldn ' t just be a pullover head and scales – maybe a few little spikes , horny - toadish and nasty . " " ( ) Michael Westmore has repeatedly referred to the black spikes ascending from the Reptilians ' heads as " porcupine quills , " presumably because his idea for the spikes was influenced by the coat of a porcupine . ( ; ; " " , issue 103 , p . 16 ) He admitted , " " I ' ve always wanted to do a character that had porcupine quills coming out of its head – that ' s why we twisted them , bent them ; it ' s not just spikes . " " Many concept sketches for the Xindi - Reptilians were done by Michael Westmore , before the design was whittled down . ( ) In the final draft script for ENT Season 2 finale , the species was described as " terrifying - looking " , with " animalistic features " . Though " The Expanse " was the first appearance of a Xindi - Reptilian , a few modifications were made to the species thereafter . These included the addition of the bumpy facial feature common to all Xindi . ( ) Representing each of the Xindi - Reptilians ' faces involved the use of a delicate , full - facial latex prosthetic . The appliance specifically covered the neck and the entire front of the head . The prosthetic was extensively airbrushed to create skin texture , shadows , and definition . The small tusks protruding from near the mouth and the black spikes extending from the head were made of resin . The Reptilian makeup also incorporated pointed teeth which , compared to Ferengi teeth , were slightly longer and meant to look more menacing . Contact lenses were worn by the actors who played Reptilians , which is how their eyes were made to seem lizard - like . The first time Reptilian hands had to be represented in an " Enterprise " episode , the series ' makeup department glued scales onto the relevant actors ' hands and gave them long fingernails . ( ) In fact , prosthetic pieces were crafted out of foam rubber for both the tops of the hands and the palms . All the pieces were then painted for on - screen usage and the palm applications were designed to represent scales . When Reptilians started being involved in stunt sequences , the make - up approach was deemed no longer viable , so the members of the species were portrayed as wearing gloves . This implied that Reptilian nails could retract , to fit inside the gloves , and extend . Michael Westmore remarked , " " It should be interesting to see , at some point , all of a sudden the nails retract as they put a glove on . " " The complexion of Reptilian skin also changed during the third season of " Enterprise " . The first three Reptilians to be shown on - screen all had much the same " neutral brownish tones , " in the words of Michael Westmore . He cited the Reptilians , later in the season , as varying with a mix of green , brown , and red . ( ) A spiked Xindi - Reptilian breast piece shown in consisted of several latex molds . These were adhered together , before the chest application was painted in the fashion of scales . Costuming . In the final draft script of " The Expanse " , the Xindi - Reptilian ( in the first scripted description of a member of the species ) was scripted to have " heavy armor " . After the theatrical release of had run its course , Costume Designer Robert Blackman decided to create the costumes for the Xindi - Reptilians , who were about to make their on - screen debut in ENT , by reusing Reman costumes from the film . They were made from a polyurethane stretch fabric that Blackman had already used in the creation of Starfleet EV suits for ENT . ( " " , p . 221 ) He later explained , " " The idea was to reuse the " Nemesis " Reman foot soldiers [ suits ] but make them be entirely different . " " Originally under the impression that he would be required to create an enormous quantity of Reptilian uniforms under the ever - present time pressure , Blackman came up with the idea of altering the costumes with " cages " . ( ) " " I saw a picture of a cage and thought that would be a good way to do it , " " he said . This was obviously a relatively cheap way of modifying the uniforms . Broad cages of wire armor were therefore added for the Reptilians ' reuse of the costumes . Explained Blackman , " " I used aluminium tubing as a frame , and made the rest out of vinyl hose . " " ( " " , p . 221 ) The alterations to the costumes included the removal of breastplates which had been part of the Reman configuration of the suits and making them into two pieces rather than a single piece , which meant they were easy for the actors to get into and were consequently more user - friendly for episodic usage . ( ; " " , p . 221 ) The wire cages were extremely delicate , so a great deal of care had to be taken to avoid damaging them . ( text commentary , ENT Season 3 DVD ) Despite this , Bob Blackman thought they were indeed a good addition to the costumes . " " We didn ' t think about them doing stunts in those , and the first time they got rough in them we just held our breath – but they came through just fine . " " The meshes also echoed the wiry quality of the spikes above the head . " " And for all of that – Michael and I didn ' t really talk about any of that , the quills . So when you look at the quills and you look at the cages and go , ' Well – how did that happen ? ! ' – I don ' t " know " how that happened ! " " ( ) Other notes . As well as being portrayed by live actors and stuntmen , Xindi - Reptilians were also depicted with a mannequin ( in the case of the Xindi - Reptilian corpse in " The Expanse " ) and computer - generated figures ( such as in the first shot of the Xindi weapon ' s interior , in ) . ( ; " Countdown " text commentary , ENT Season 3 DVD ) The look of the Xindi - Reptilians influenced the CGI design of the Xindi - Insectoids and - Aquatics , as well as helping to make the task of designing the Primates easy . ( , pp . 51 , 52 & 56 ) Also , the faceplate from the Xindi - Reptilian make - up design went on to be reused ; it was kit - bashed with other prosthetic pieces , to represent an unnamed Coalition of Planets dignitary in the two - parter and . The Xindi - Reptilians gained the approval of Archer actor Scott Bakula , who enthused , " " I love the Reptilians . . . the visual that [ the art department ] created with the Reptilians I think is spectacular . " " ( ) Dolim actor Scott MacDonald also liked the Reptilians , commenting , " " There were several extras playing Xindi soldiers , so it was pretty cool , me walking around with my troops . " " In a interview , Michael Westmore cited the Reptilians as one of " two things I loved doing on " Enterprise " . " He went on to refer to the species as " fascinating " and further remarked , " " The heads , with the porcupine quills coming out of them , were gorgeous . " " Consulting Producer David A . Goodman regarded the Reptilian make - up as " amazing " and " remarkable , " an opinion which Director David Livingston agreed with . ( audio commentary , ENT Season 3 Blu - ray ) Regarding the Reptilian uniforms , Co - Executive Producer Chris Black admitted , " " I love those costumes . " " Executive Story Editor André Bormanis stated , " " It made sense in the context of the civilization we were trying to portray here [ . . . ] You can see these guys have a very distinctive look and that ' s a costume style that we ' ve never seen before . " " Black agreed but he and Bormanis also joked that the Reptilians might use their uniforms , with all the tubing therein , to distil alcohol , concocting Xindi - Reptilian moonshine . Bormanis jested , " " It ' s how they get through the day , " " and Black concurred , " " Exactly . They have little jars at their waist that it ' s just slowly dripping into . " " ( audio commentary , ENT Season 3 Blu - ray special features ) When asked to cite one of the Xindi species as the one he believed to be the most complex and disruptive in the Xindi Council , Jannar actor Rick Worthy initially responded with uncertainty as to which was the most complex but then stated , " " Perhaps the Reptilians . They ' re warhawks , really . They ' re bullheaded , and it ' s difficult for them to see others ' point of view . " " Several Xindi - Reptilian make - up appliances were sold off on the " It ' s A Wrap ! " sale and auction . One such piece was a painted , heavily detailed face application . One of its head spikes had come loose from the prosthetic , owing to time and use of the mask , but the application sold for US $ 786 . A group of Reptilian prosthetics was included in the auction too , in a lot additionally consisting of two Xindi - Primate masks . The Reptilian portion was comprised of a full - facial application , a pair of hand top coverings and a pair of palm coverings . All these pieces were unpainted except for one of the palm coverings , which had been painted but retained the tear - away foam rubber which exists during casting . Another lot consisted of a facial application and a chest and shoulder prosthetic piece . Both of these were painted and the mask was known to have been worn by Scott MacDonald . Two other Reptilian masks were sold at the auction , one of which fetched US $ 760 . Yet another lot presented at the auction consisted of the breast piece from " The Council " and the facial prosthetic used for the aforementioned unnamed dignitary in " Terra Prime " and " Demons " . The latter item was originally misidentified as a Xindi - Reptilian mask worn by Scott MacDonald . The eBay entry for this lot ended early , due to the error being stated in the listing . The mistake caused much confusion and resulted in MacDonald himself trying to ensure the listing was corrected . Apocrypha . In the novelization of and ( entitled " The Expanse " ) , the Xindi - Reptilians are characterized as being extremely tall , with a darting forked tongue , a vestigial tail , a cloaca and a penchant " for sudden , deadly strikes . " The Reptilians ' scales covering the face and arms are characterized as occasionally reflecting light by glinting like dull jewels , such as amber , ruby and emerald . The Reptilian central nervous system is also described , involving a brain stem , a basal ganglia and a spinal cord . Reptilian facial expressions are said to be hard to read , to the point of the book at one point describing the facial expressions as having " all the animation of a lizard sunning itself upon a rock . " " The Expanse " describes the Reptilians as having a pronounced hatred of the Xindi - Primates . According to Primate doctrine , the Reptilians thought with their spinal cords , their intelligence having evolved from only their brain stems and basal ganglia . As of the 22nd century , the Reptilian warrior class was swiftly gaining power . Purportedly , Reptilian skin was softer than it seemed . A current event in Reptilian culture was that the warrior who piloted the Xindi probe orphaned multiple Reptilian children , who were later presented with some lavish donations from the Xindi - Insectoid s .