various troll biology headcanons (mostly about seadwellers)
there arent "sexes" in our sense: your sex is your blood color! gender doesnt really exist as a concept either
a grubs blood color is first determined (low/mid/high) by how the mother grub is feeling/being taken care of and then further narrowed by where the grub pupates and the conditions surrounding that
theoretically, a rust blood could live for a while (like, 60 sweeps even) if they werent culled :<< most deaths on alternia ARENT natural, its just that highbloods live longer because they have less to worry about that could realistically kill them
ancestors are a myth to control the populace. in fact, our trolls are unique in the fact that they actually have ancestors! amazing!
skin gets darker with age / eyes gradually shift to blood color
horns grow throughout a trolls life. large, smooth, and healthy horns are attractive because it shows that the troll puts in the effort to take care of themself
highbloods have bioluminescense, especially pronounced in seadwellers
seadweller gills are on the sides of the torso. think like the deep has from "the boys"
purples have vestegial fins and gills; all but useless
i personally dislike g/rubscars. g/rubscars are a fandom psyop. i am anti g/rubscar and proud because having weak points on the sides of your body is stupid as fuck. (except where its necessary, like gills, which are SUPER sensitive, but i think most seadwellers are strong and scary enough to survive a partial nerf). trolls also dont have nipples or belly buttons
seadwellers and purples can flair their fins out :33 some can control this even
seadwellers have to manually breathe on land (or if theyre like eridan, manually breathe underwater). seadwellers (and some purples) are also super sensitive to salinity and pressure changes around their body
rumblespheres store nutrients like a camels humps. bigger rumblespheres are considered attractive and a sign someone is healthy
lowbloods can withstand more sunlight and are more comfortable at warmer temperatures. highbloods cant withstand the sun as much, especially seadwellers (and some purples) who can dry out. highbloods like it cold. highbloods also tend to be fatter, not only as a sign that they are healthy (which is attractive), but also to protect them from the cold and keep heat in
lowbloods are physically weaker and more prone to getting hurt physically
highbloods are more susceptible mentally and tend to be less stable than lowbloods
lowbloods eat more plants and their teeth reflect this. highbloods eat more meat and seadwellers are obligate carnivores (rust and bronze tend to eat exclusively plants in turn)
trolls grow as they age and never stop. this is why highbloods are seen as huge!
seadwellers have a version of underwater sign language that is all but a lost language
quadrants are made up in order to control the masses, but everyones used to it by now so its kind of real, if only in the realm of fiction (lots of trolls still "feel" this way!)
4 fingers and 4 toes on each appendage :33 counting system is base 8 because of this
seadwellers have webbed fingers and flatish limbs to help move underwater
seadwellers have a back ridge that helps them stabalize, along with a swim bladder, a second clear set of eyelids, among other things (purples too)
some trolls have tails, but this is a lot more common in lowbloods. troll tails are ungulate in appearance. in highbloods, when they do appear, tails are super thick and look dolphinish. the back ridge can also be extended for these cases and become a fin