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Big guy? Red face? Four arms? Never heard of 'em.

Upgrade to Azmuth's Father, while the latter was hunting Four Arms.[1]

Tetramands[2][1] are an alien species from the desert planet Khoros.[merch 1]


Tetramands are a buff and bulky species. Most Tetramands are red, but blue and brown ones have been seen. Tetramands have spikes on their arms, and sometimes on their heads. They have two front toes on each foot. Tetramands appear to have an additional set of smaller pectoral muscles below their primary set to help move their second set of arms. Each one of their four hands has three fingers and a thumb. They also have four eyes.

Female Tetramands have hair.[pop-up 1][3] Male Tetramands have hair that turns gray as they get older, but most of them lack hair.

Younger Tetramands are skinnier than adults and have disproportionately larger eyes and heads.

Tetramands have an average height of 10 feet[merch 2] and can grow to be as tall as 15 feet high. Female Tetramands are usually taller than the males.[pop-up 2][4]


Tetramands are a warrior race. Generally speaking, they are fairly aggressive and favor violence.

By nature, Tetramands are extremely emotional creatures, just like Humans.[pop-up 3][5]

Because female Tetramands are traditionally stronger than males, they are in turn considered the better warriors, and due to this, if a male Tetramand manages to defeat a female Tetramand, the male becomes the female's chosen husband.[6]

As a Tetramandian custom, the bride collects four items before a wedding: "Something conquered, something bruised, something severed, and something blue."[7]

Tetramands are not very amicable towards outsiders, as in the case of Kevin when he went to get one of their Tetramand Engine Blocks for his car. Initially, he was refused, until he agreed to marry Princess Looma in three years, after which he was allowed to have the Engine Block.[6]

Tetramands are very strict in the upholding of their laws; an offender whose crime was merely jumping the turnstiles at an auto show was buried up to his neck in sand.[8]

Tetramands are not big on exceptions, even to other law enforcement officers like the Plumbers.[9][8]

Tetramands have a unique way to ultimately decide court cases; fight. Tetramands get to fight with their accusers in a battle arena and the winner of the Tetramand Trial of Combat wins the case. There is nothing in the rules that states that the person must stay a Tetramand.[10][11]

Tetramands are a spacefaring race that are a part of galactic society. They may either settle on any number of worlds and raise a family or live their lives on starships that rarely return home to Khoros, if ever.[DJW 1]

Tetramands live in very close knit family tribes and defend their kin to the death.[merch 3]

Powers and Abilities

The Tetramands' most prominent ability is their enhanced strength, being able to lift several times their own weight and punch through various resilient materials with ease. Technically speaking, Tetramands are physically stronger than Methanosians and Vaxasaurians at base size.[DM 1] Female Tetramands are generally stronger than their male counterparts.[12][13]

A Tetramand's strength allows them to use anything heavy as a weapon, from big rocks they can throw several feet away, to beams and pillars that can be used as clubs. Their great strength even extends to their jaws and bite, allowing them to bite metal and damage it.

The older a Tetramand grows, the stronger they become.[14]

Tetramands can create strong shockwaves by clapping all four of their hands together.[4][15][16]

Tetramands can alternatively create shockwaves by slamming their fists on the ground.

Tetramands can jump several times their own height, at least seven stories up, in a single bound.[17]

Tetramands can climb up walls by pushing their fingers into them to make hand holds.[18]

Tetramands have a high level of enhanced durability due to their tough and thorny skin.[pop-up 4][4]

In correlation to their durable skin, Tetramands are highly resistant to fire, such as that generated by a Pyronite.[19] Their skin also makes them laser-proof.

When infected with a cold, Tetramands can sneeze out sprays of slimy snot from their mouth, and although disgusting, this can be useful against insects.[20]


A Tetramand's bulk can sometimes become a disadvantage, as all the extra muscle mass makes them relatively slower than other opponents and their immense size makes them an easy target for enemy attacks.

A Tetramand's size can make moving through areas designed for small species, like the Rust Buckets 1[21] and 2,[22] difficult.

Tetramands can feel pain from electricity, such as those generated by Nosedeenians[23] and Gimlinopithecus.[16]

Tetramands can get drowsy by Porcupine's quills.[24]

If under the effects of a cold, a Tetramand's strength and stamina are severely reduced, their skin turns from bright red to a dark shade of orange, and they develop pungent hives in their armpits.[20]

Tetramands can feel great discomfort while being attacked by a swarm of ants.[20]


Tetramands make the toughest and most durable engines in the galaxy.[8]

Tetramands are shown to have a far more advanced civilization than humans.

Notable Tetramands

Notable Tetramand Hybrids


Tetramand is made of two Greek words "tetra", meaning four, and "mand" meaning arms. Thus, it literally means Four Arms.

Naming and Translations

Language Name Origin
Spanish (HA) Tetramand
Cuatrobrazos (Ben 10: Destroy All Aliens)
Diamante (Ben 10: Destroy All Aliens)
Tetramandiano, Tetradiano (Catfight)
Tetramano (Universe vs. Tennyson, Rook Tales and Fight at the Museum)
Tretamandiano (Let's Do the Time War Again and Malgax Attacks)
From the original English name;pronounced as /tɛtra'mand/ (The Galactic Enforcers and Ben 10: Omniverse until OTTO Motives) and as /'tɛtramand/ in (OTTO Motives).
From cuatro, four and brazos, arms; dub error (Tetramands are referred by Four Arms's Latin American name).
From diamante, diamond; dub error (Tetramands and Tetrax have Diamondhead's Latin American name in Ben 10: Destroy All Aliens).
Tetramandiano, Tetradiano and Tetramano are variatons of Tetramand; pronounced /tɛtraman'dɪano/, /tɛtra'dɪano/ and /tɛtra'mano/ respectively.
Tretamandiano is mentioned due an unknown dub error.


  • Tetramands have multiple arms to help them fight the giant predators on Khoros.[pop-up 5][28][pop-up 6][29][merch 3]
  • The pyramids were built by Tetramands[2][1] with the assistance of humans, as well as two Galvans.[30][DJW 2]
  • Originally, Tetramands seemed fairly Bronze Age-y for their level of technology.[MW 1] This was retconned in Omniverse as Tetramands are shown to have a far more advanced civilization than humans.
  • The Shokans from the Mortal Kombat series share some similarities with Tetramands, both species having two toes, four arms and amazing strength.
  • Ben owns a red Tetramand flag in his bedroom.[DJW 3]
  • The Tetramand species seems to be loosely based on the Klingon race in the Star Trek Some evidence of this includes their similar war-like nature, the Tetramands' society's division into tribal systems, like the Klingon "Houses" as well as resolving disputes through judgment by combat. More evidence is in the name of the Tetramands' home planet, Khoros, which bears a striking similarity to the name of the Klingons' home planet, Qo'noS.



Crew Statements

Dwayne McDuffie

Matt Wayne

Derrick J. Wyatt


Sapient Species
AcrosianAerophibianAmperiAnoditeAppoplexianArachnichimpArburian PelarotaAtrocianBiot-savartianCelestialsapienCerebrocrustaceanChimera Sui GenerisChronianChronosapienChurlCitrakayahConductoidContumeliaCrystalsapienDetroviteDracosianDragonEctonuriteFloraunaGalileanGalvanGalvanic MechamorphGeochelone AerioGimlinopithecusGourmandHighbreedHulexHuman (Osmosian)IckthyperambuloidIncurseanKineceleranKraahoLenopanLepidopterranLewodanLimaxLoboanMaxatomarMerlinisapienMethanosianNaljianNecrofriggianNemuinaNosedeenianOpticoidOrishanOrthopterranOryctiniPantophagePetrosapienPiscciss PremannPiscciss VolannPlanchakülePolar ManzardillPolymorphProtostPrypiatosian-BPugnavorePyroniteRevonnahganderSegmentasapienSlimebioteSonorosianSotoraggianSphoeroidSplixsonSylonnoidSynthroidTalpaedanTetramandThep KhufanTo'kustarTransylianUxoriteVaxasaurianVladatVreedleVulpimancerZaroffian
Unnamed Sapient Species
Argit'sAstrodactyl'sAtomix'sBall Weevil'sDagger AliensDecka'sEnforcer Alien'sGutrot'sHobble'sInspector 13'sKickin Hawk'sMedic'sMole-Stache'sPakmar'sPickaxe AliensProbity'sStone CreaturesTack'sTiny'sToepick's
Evolved Sapient Species
Evolved AppoplexianEvolved ArachnichimpEvolved Arburian PelarotaEvolved GalileanEvolved GalvanEvolved HumanEvolved MethanosianEvolved NecrofriggianEvolved Polar ManzardillEvolved SonorosianEvolved To'kustarEvolved VaxasaurianEvolved Vulpimancer
Non-Sapient Species
Airborne Clown VirusAldebaran BeidafangsAnubian BaskurrBuglizardCassiopeian Dream EaterChupacabraCorrupturaCrabdozerDasypodidaeDravekGracklflintHavoc BeastHumpbackusKaosseffexx UltimasauriaLucubraMuroidNanochipNight MareNull GuardianOmnivoraciousPallorfangPanuncianPsycholeopterranQuartilloptusRoot SharkSand RipperScreegitScrutinSlammoidTerroranchulaVicetopusVolaticus biopsisWigzelian Org BeastXenocite
Unnamed Non-Sapient Species Evolved Non-Sapient Species
Cyber SquidsKhoros Reptilian MountLiving MushroomsMucilator'sSquid MonstersTerroranchula's SpeciesTime BeastsUnnamed Turrawuste Species Evolved Panuncian
Non-Canon Sapient Species
Sool & Gontu's Species
Non-Canon Non-Sapient Species
Cyber Squids (Vilgax Attacks)