Hi!! Iāve just spent way too long writing down a probably excessive amount of worldbuilding for Jevinās species in @martuzzioās hermit space outlaws AU!!! Disclaimer: I pulled everything scientific-sounding in this post straight out of my ass. Also Iām pretty sure I contradict things that have been established as canon at at least a couple points. martuzzio, please feel free to take this or leave it, or only take part of it, whatever you like. I just got hit by worldbuilding inspiration! And I had to get it out!!
Modern slimesā ancestors were simple, non-intelligent slimes a lot like the Minecraft ones. Jevinās species (the only intelligent species on the planet) is specifically descended from cave dwelling slimes, but there were also species that lived aboveground in damp environments such as swamps.
Ancient slimes needed very damp environments in order to survive. (Even the ones that lived aboveground were nocturnal, because direct sunlight could be deadly to them!) Modern slimes, including Jevinās species, are much much more resilient than their ancestors, though hot and dry environments are still bad for them. This change came about because of a mass extinction event that killed most ancient slime species as well as most other life on the planet!
Slimeworld used to be a very wet place, but several million years ago, something happened to cause a planet-wide drought. The evolutionary pressures of the drought are what eventually led to the rise of Slimes as an intelligent species - before then, there was no intelligent life on the planet.
The cause would have to be unnatural, because I'm pretty sure thereās no natural way for a planet to just lose all its water. So I think some advanced spacefaring species came and drained most of the water off of Slimeworld for some reason. Why? Who knows, theyāre probably all dead now.
This catastrophe left almost no habitats for slimes to live in. The surface-dwelling species almost all died immediately, with only a few hanging on in obscure corners of the world. The ones in the caves were a little safer, but not for long, because the devastation wasnāt just limited to slimes!
The extreme damage to Slimeworldās environment killed off most life on the planet. The ancient cave slimes thrived for a little while! Dead stuff falling into caves from above had always been their main food source. But eventually the fallout of the drought settled and the famine hit them too.
Food was scarce and it wasnāt coming to them anymore. Anything that wanted to eat on this new world needed to be able to survive and ideally travel long distances in the harsher climates of the outside world. Most cave slimes couldnāt do that, so most cave slimes died off. But a few had mutations that let them do just well enough to survive. Those were the ones that evolved into Jevinās species!
Ancient slimes spent a long time hanging around cave mouths, rolling out at night to find food and retreating back during the day. The ones that got the furthest and still managed to make it back were the most successful. The first big break of the Slime species in terms of intelligence was when they started carrying their shelter around with them instead of having to hide every day.
Thatās right: the first human technology was sharp stick, but the first Slime technology was leaf hat.
Ancient slimes started out pretty much the same as slime molds here on Earth. They were colonies of individual organisms that all acted together like a single body, but could survive just fine on their own. However over time they evolved to become more and more dependent on the colony, and the cells became more and more specialized. Now theyāre something in between a colony and an individual! Each cell of their body is technically a different organism, but they canāt function outside of the colony. Also, each colony does have a single consciousness, theyāre not hiveminds.
They evolved like this because in the harsh environment of the drought, a single cell would die in minutes. A colony could retain moisture for much longer! The fact that colonies were now staying together all the time let them start to evolve more internal organization, which led to the evolution of intelligence!
Slimes are very structurally simple. A slime is made up of a jelly-like mass and a more rubbery, less malleable core.
The jelly layer cells have a unique structure - under a microscope they kind of look like sea urchins, but with long flexible tendrils instead of spines. The way they tangle and cling lets the slime hold together and keep its structure instead of melting!
The tendrils also act as transmitters and receptors for the electrical signals sent out by the slimeās ābrain.ā Each cell is in constant communication with all the cells around it, which is how a slime moves and controls its body. They also pass nutrients to each other based on chemical signals!
However the structure of these cells means that they lose water very easily. In hot or dry environments, the tendrils of the cells retract to reduce the amount of surface area that water can escape from. This means they donāt cling together as easily, and the slime āmelts.ā Enough time in its melted state and the cells start to die because nutrients arenāt being passed around the body like they should be.
The jelly-layer cells are all pretty much interchangeable. Theyāre also very adaptable! When exposed to open air, jelly cells lock up their tendrils and partially dehydrate themselves, passing the liquid back into the mass of jelly behind them. The result is the thin, rubbery āskinā of a slimeās body. This was the most crucial adaptation that allowed modern Slimesā ancestors to survive the drought, since it drastically improves their ability to retain water.
The core cells are different, more structured. The core is a slimeās brain. If most of a slimeās body is like jelly, the core would be like stringy algae. Itās still very flexible and malleable, but if it tears or breaks, that damage canāt just be healed by squishing the parts back together. The brain is usually kept scrunched up safely in the middle of the slimeās body, and thereās a dense layer of more rubbery jelly surrounding it.
Slimes can digest almost any organic material, but a lot of the life on their planet evolved to be toxic to them, and if something is toxic to slimes you better believe itās toxic to most everything else. There are a lot of really weird toxins native to Slimeworld!
First Iāll just copy/paste the ask about Slime fashion I sent to martuzzio a while ago since I am still enamored with it:
idea: since they're blind, Jevin's species's fashion is entirely based around the vibrations they make when they contact whatever surface they're moving on. you pick up different materials or combinations of material depending on what "look" you're going for and hold it on the outside of your body. they could use all kinds of material for this - cloth, metal, powders, whatever. you arrange different items in patterns on your surface to create different "outfits" (soundscapes) of vibration. the more complex the pattern, the fancier and more formal the "dress." this stuff makes it a bit more difficult to move since it reduces their traction, and it also takes effort to maintain more complicated "outfits", so dressing up is really only for formal situations or showing off. casual dress is keeping just a few things you like the sound of on your surface, and it's also perfectly acceptable to wear nothing at all. of course this all looks really weird to people with eyes.
Slime language doesnāt just involve sound. It also incorporates chemical signals (which give a sense of the slimeās mood and fulfill the same function as body language does for us humans) and touch. Two slimes having a conversation will press tendrils of their body together and communicate with something like a cross between braille and sign language. This is actually the main component of their language - sound is kind of secondary. Itās impossible for a non-slime to āspeakā the slime language without the help of technology, and slimes canāt make the range of sounds that humans do with their vocal cords. Fortunately they can hear at least as well as humans and using a soundboard to talk is pretty intuitive for them!
Most slime cities are either underground or underwater. The oceans of Slimeworld are pretty densely populated! It actually led to a lot of environmental problems in the Slime speciesās history, because there isnāt a ton of ocean left to live in. A lot of aquatic animals on the planet went extinct during the slimesā industrial revolution a thousand years or so ago.
Slimes obviously donāt have visual art since theyāre blind. Some of the main art forms of the species are perfume and culinary art! Because of all the stuff on their planet thatās toxic to them, slimes evolved a very keen sense of taste/smell. They can detect minuscule amounts of a chemical. Most other species canāt appreciate their art because their senses arenāt fine enough to pick up on all the subtle flavors and smells! Also slimesā ideas about what tastes and smells good can be... eccentric.
They also do sculpture and music. They have some really awesome musical instruments because they can shape their body to whatever shape it needs to be to use the instrument!
Personal space isnāt really a thing in slime culture. Their language requires being in constant contact to speak, so casual touch with strangers isnāt just normal, itās the polite thing to do. If thereās a group of slimes in a room, each one is pretty much always touching at least one or two others. Blobbing together is natural for them!
...aaand thatās all I got for now, because itās 4:30 AM. I hope this is coherent because I didnāt really edit it! If you have literally any questions at all please let me know! because there are certainly details that didnāt make it in here!!