they’re a weird species of alien reclassified as ‘dragons’ or 'capricorns' on earth

have a set of filtering gill-like slits on their neck which they normally breathe out of due to the nature of their homeworld's atmosphere.

earth doesn’t have that kind of atmosphere so their lungs and blood can be easily oversaturated with oxygen, most of their species takes up smoking to balance it out

they have a wider visual colour range than humans but very poor nightvision. can see in infrared. very aquatic species. vocal cords are similar to a myna bird in which they excel at mimicry

neat parlour trick they like doing is talking through their gills. many do this so they can eat and still converse with people, but it can be pretty unsettling to behold to those who aren’t used to it.

classified as an all female race, they’re equipped with ovipositors, some groups have a hive-like ranking system where there is a queen and her influence can create a number of sterile soldiers and physically alter their anatomy, but those folks don’t tend to leave the homeworld.