Let me tell you about the Pa'rians. As an alien species, I won't say they're insane. That's not because they aren't insane, it's because a) they would probably take it personally and b) it's more than a little impolitic to say so.
Their resemblance to Koraxians is not coincidental. They allegedly originated from the same species as Koraxians, Salmaxians, and a few others that are lost to time. The Pa'rians just happen to be blue. They come in many, many shades of blue, only some of which humans have names for. If that was all one needed to know about them, they would be a kitschy part of the Milky Way travelogue.
But they've never been content to leave it at that. To give you a sense of their disposition, they once sent a fleet from centuries in the future to the present (2096 C.E. technically) in order to conquer the galaxy. Their technology was not advanced enough to take on the future galaxy, but they figured it would be enough to defeat the past galaxy, so they went for it. Their contemporary counterparts thought it was a swell plan, too. It was a fraught seven or eight weeks as they started laying waste to everything they could get to, and it only took the combined efforts of basically everyone else to put the smack down on them. Even the Koraxians got in on it--they didn't want the competition, frankly. There's only room for one omnicidal imperialist empire in this galaxy.
They are roughly as squishy and slimy as Koraxians, though they seem to take much greater pleasure in the noises it makes. Koraxians are infamous for their two flavors: Rational and Emotive. Some would tell you that these are apt descriptors, that the Rationals act on logical sequences of thought while Emotives behave essentially randomly based on their feelings. My experience is that they're equally irrational, the "Rationals" just maintain an extremely cool demeanor while explaining their plans to genocide and/or enslave your entire species.
Pa'rians aren't like that. They are all chaotically, constantly emotionally volatile. Nobody likes having diplomatic relations with them because they'll fly off the handle over anything. They don't like your hair? War! Your ship pointed at them a way they didn't care for? War! They got a sniff of your deodorant and thought it was a little too floral? War! To say everyone's main priority with the Pa'rians is containment is like saying a house infested top to bottom with termites has a mild structural problem.
I hate to sound completely down on them all the time, though. I've met a few specimens that were downright tolerable to be around for more than five seconds. And perhaps one of the more amusing bits of trivia is that their society follows a clan structure. They have exactly 387 clans. If a clan ever disbands, a new one must be created. No one is allowed to create clans in excess of 387. If someone makes a 388th clan outside the lone circumstance of another being folded up, they will stop at nothing to destroy the outlier. They rotate leadership roles between the clans on a schedule that's superficially similar to the Fibonacci sequence but is significantly different as it's based on their own mathematics and calendars. You never know which clan you're gonna deal with this week, is what I'm saying.
To make things even more fun, every clan is required to know the full public history of their race, essentially an official oral history everyone must know from memory. But each clan also has a unique secret history which elucidates their internal political timeline along with a charismatic origin myth; other clans are forbidden from knowing the secret history of any clan besides their own. When a clan disbands or a new one is created, the secret histories are discarded and made anew. You might say Pa'rians have a fluid relationship with time and facts. Keeps things interesting.
So, without further ado, I present you the most recently known 387 Pa'rian clans, as roughly translated into English as I can manage: