"The six humanoids are humans, fishfolk, merfolk, mersol, ray-solon, and claw-solon. Humans evolved naturally but were used as a base to create others. Their interbreeding acts like three codominant alleles, meaning the pure-breeds will always breed true, the hybrids will regularly produce throwbacks, and they don't hybridize into further fractions. Ray Solon are tall and have 6 tentacles in place of arms. Very prosocial and community-minded, and make up most of the inhabitants of MuurKari. Their hybrid with humans are the claw solon, which trade in 2 pairs of tentacles for arms. Merfolk are the other pure-breed, with fish-like tails in place of legs, and gills with no lungs. They inhabit the saltwater oceans of the system, and are otherwise pretty similar to humans. Fishfolk have human body plans but shorter legs, both gills and lungs, and often have scaly patches. Mersol (solon-merfolk hybrid) are very rare, but have humanoid upper bodies with 8 tentacles in place of legs.
"The other main group is the Saurians, composed of two pure-breeds (the shoth and kiarasa) plus their sterile hybrid dracona. Kiarasa, like the chief ambassador and the High Priest, are experts at administration and leadership. Shoth are the opposite - mentally dull but physically powerful. Dracona are a middle ground that is fairly human-like in their abilities, and are known as skilled craftsmen.
"Tripods have three arms and three legs, and an unfortunate high reproductive drive which once caused war. This has been solved with the creation of a genetically-engineered symbiote which can imitate fetuses within the queens and prevent overpopulation. Besides that, they are usually model citizens as long as they're permitted to spread out within other species' cities rather than live close enough to their own kind to have to smell rival queens' pheromones.
"Owlida were the first created species, and include the Master of Exploration, there. Small, peaceful, and brilliant at technology. They were originally created to inhabit the Netarin moons, but the zoenshoeth ruling that planet eventually grew tired of them and replaced them with the tripods. That they survived at all is due to the zoenshoeth of Tle, who collected an arcology full of them and squirreled them away in her zoo for extinct animals. They were released along with the Saurians only a few hundred years ago.
"Dryads were the most recent species, created after humans nearly wiped themselves out 700 years ago, to preserve what they could of the cities and culture of the time. They are plant-like, spending a long adolescent period as mobile saplings, using artificial chassis as skeletons to move their flexible branches against like muscles. When they've grown too large to continue, they join large Groves composed of thousands of dryads who have merged into massive hive-minds which make up several cities in the tropical regions of Tle."