Ferocious, extremely tough reptilians with expansionist tendencies, known for especially brutal treatment of the defeated.
- Agony Beam: All Scarrans have one naturally built in.
- Always Chaotic Evil: Subverted — while very aggressive and almost psychotic at times, they can be reasoned with.
- Balls of Steel: As Chiana found out the hard way, their mivonks are internal.
- Henchmen Race: They employ two of these. The Kallish are a conquered race that handles administrative and technical work, while the Charrid voluntarily signed up and act as ground troops.
- Mars Needs Women: They toyed with the idea of using Sebaceans as breeding stock. Following Scorpius' rebellion, they decided it wasn't worth the trouble, particularly since the success rate for said breeding was pretty low and the outcome was fairly disappointing by their standards. In an alternate timeline they had better luck with Earth humans, to the point that the planet's population is entirely composed of hybrids.
- No-Sell: They almost literally shrug off blasts from any weapon smaller than a bazooka.
- The Reptilians: They are lizard-like aliens. What to expect?
- Telepathy: Most high-class Scarrans have a certain degree of telepathic power; it's not based on any psionic ability though, it's probably more connected to their heat gland being very good at coercing truthfulness.
- Terminally Dependent Society: Scarrans have to regularly eat the petals of a flower called "Crystherium Utilia" to remain sentient. They've been able to pass this off as a cultural delicacy, but in reality there are only a few planets that can support them which places a limit on Scarran expansion. Earth is such a planet (it's a Bird of Paradise flower, a common houseplant) which John lets slip before he learns of their importance. Scorpius considers destroying even one patch such a major victory that he lets John out of his promise to give him wormhole tech in exchange for it. It's implied but not confirmed that access to the flowers determines the Scarrans' cast system, with big-brained, ruling-caste Scarrans like the Emperor controlling access to the supply to benefit themselves and maintain their hierarchy.
The leader of the Scarran culture, determined to increase his race's power by (almost) any means necessary.
- Affably Evil: Is shockingly polite compared to the average Scarran. It's only when Crichton and company begin sneaking around that he starts to lose his cool, or when he decides to take Ahkna's advice.
- Always Chaotic Evil: Zigzagged. He acknowledges that the Scarrans are incredibly violent and ruthless, but he takes issue that other species flanderize his species as "brutish, ignorant".
- Big Bad: Takes over in season four and The Movie.
- Brainwashed and Crazy: Inverted. He gets influenced by an Eidolon in an attempt to end the war with the Peacekeepers, and it's largely successful... until Ahkna kills the Eidolon and dispels the control he had on Staleek.
- Costume Porn: Staleek's crimson-and-gold-trim regalia would stand out in any crowd, much less when found on a member of a species that tends to prefer black.
- Evil Overlord: He's the Emperor of the Scarrans.
- Large and in Charge: Stands at least a full head taller than any other Scarran on the show.
- Noble Demon: Is much more diplomatic than any other members of his race, and was even eager to pursue a ceasefire with the Peacekeepers until Ahkna screwed it all up by shooting the Eidelon.
- Opposing Combat Philosophies: With Ahkna. While Staleek himself is at least in principle willing to deal with Crichton, Ahkna tries to sabotage any deal at every turn. He's less than pleased about this, because as Emperor, his word of honor is his trust capital.Staleek: STOP! SEEING BITUBIAN VIPERS IN EVERY CORNER!! And never countermand my orders again.
- Villainous Breakdown: Looks rather.... apprehensive at agreeing to a peace treaty with the Peacekeepers. Guess that's what happens when you're almost literally two minutes away from getting swallowed up by a wormhole weapon.
War Minister Ahkna
The brutal and grudgeful leader of the Scarrans' war effort.
- Cute Monster Girl: Due to belonging to a more higher caste, Ahkna has a more human-like appearance than other Scarrans.
- Famous Last Words: "At least you die," referring to John, but she gets killed by Aaeryn seconds before Ahkna pulls the trigger.
- Hot Skitty-on-Wailord Action: Borderline case — Ahkna was apparently courting Pennoch, a member of a lower Scarran caste.
- Opposing Combat Philosophies: With Staleek. He's willing, at least in principle, to bargain with Crichton, but Ahkna does everything she can to sabotage the deal.
- The Starscream: To Staleek. Strangely, Staleek himself let her sit on his throne, giving her an ultimatum - carry out one final order from him, and get a promotion that would subsequently lead to her becoming "Empress".
A Scarran soldier. He is perhaps best known for being the father of Scorpius by Rylani Jeema Dellos.
A Scarran and a former captive of the Peacekeepers. Shortly after being captured, the Peacekeepers removed his heat gland, making him unable to perform the Scarrans' natural heat-based attack.
A Scarran freighter captain and a member of the Scarran ruling caste.
A Scarran female stationed on a Scarran Dreadnought in charge of Scorpius' training as a child.
- Abusive Parents: The closest thing to a parental figure Scorpius gets and she certainly wasn't a pleasant woman to be around.
- Evil Mentor: Attempted this.
- Eye Scream: She gets two of Scorpius' eye things smashed into her.
- Fantastic Racism: Constantly hurls insults at Scorpius' Sebacean side as weak and useless.
- Karmic Death: Dies in the same room and at the hands of the same weapons she inflicted on Scorpius.
- Mind Rape: To a literal extent when she forces Scorpius to see his mother's rape at his father's hands.
The Scarran envoy to the Sebacean Breakaway Colonies and accomplice of Prince Clavor.
A Scarran interrogator.
A Scarran soldier and spy.
A Scarran scout.
A high ranking Scarran soldier and the lover of War Minister Ahkna. He often appears in the service of Ahkna or Emperor Staleek and can often be seen at their side or carrying out their orders.
A Scarran spy from the Ruling Order who infiltrated the band of Coreeshi bounty hunters.