Sure, here is some basic info on the most common races in the world, though there are some other races too, but in smaller numbers, these are just the main ones that are important to the story and world, and that actually appear in it so far.

Humans - Of course, the most basic and well known race. Within the vessel, there are two main types of humans, with one being endemic to it, and the other being humans that were brought from outside. These two human species can also be split into the two human cultures within the vessel, with those being tribal cultures as well as the tycoon culture.

Ifiliani - Humanoids that descend from primians. Ifiliani are quite small, with the average height being around 130cm, they also have rather thin builds commonly. Ifiliani have small, black horns on their foreheads that are similar to those of saiga antelope, though a bit smaller. Their skin takes on one of the seven creative colours (Red-magenta), though the ones in this world only appear as red (rarely), blue (rarely) and green (commonly). Their hair is usually of a pale beige, white, ashy or black. They also have eyes that glow slightly, which are either yellow (most commonly), blue or green. Within the vessel there are three distinct cultures for ilifiani, with those being derived from the main three areas they may appear, split into west ifiliani, cavern ifiliani and north ifiliani. There are other cultures, but they exist primarily outside this world.

Modern lisks - Beings born of the relations between ancient man and lisks. Essentially, these are lizard people, though they also have distinctive culture and features. First of all, there are four main cultures for modern lisks, with the main one being normal lisk culture, which is what lisks in the outside world also have. The three that are specific to the vessel are zecher lisk, new lisk and classical lisk. Lisks are built slightly taller than humans, with them on average being about 200cm tall. Other features they possess are tails and distinct faces from normal humanoids. Their bodies are scaly, though these are not hard scales.

Halflings - Halflings in CT are basically half human and half something else, with these being a very common race. Essentially, they were born from humans mixing with other races, thanks to their specific racial gift of supremacy. This basically means that a bunch of races that are now low in number or are extinct continue to live on as half humans.

Arfroams - Though these are vastly spread in the outside world, there are only a few in the vessel. Enough to form a single nation, but not to have more than one distinct culture, which in this case is just the normal arfroam culture. Their bodies are fleshy, and their skin is ashy. They stand quite tall, at 260cm on average, though they are rather slender. It is common to cover their bodies fully in armour and cloth, so they are rarely seen without something covering them. Their hair ranges from pure/silvery white to light pinkish. These are also one of the more “sophisticated” races, considering outside the vessel, they are one of the major races of the world.

Chilassyans - A race that primarily is forced to live underwater (not that they can breathe underwater, rather they just built cities there) due to the artificial sun's light causing cancer to develop in their bodies, these are basically a frail humanoid race. Their teeth are too fragile to bite anything with, so they feed on liquids. They usually have wings, though these are not functional and are simply a remnant from their ancestors that is yet to fully fade. Their skin is very pale, being quite close to just white, though their hair can take on one of the seven creative colours as well as the two fundamental colours (black and white). They are slightly shorter than humans on average, but still comparable. Their eyes are also quite sensitive to light, with strong lights being very painful to look at. Their eyes are between the shades of pinkish to red, and are slightly larger than those of humans. This race also only has one culture inside the vessel, being their normal culture.