Ylesia is a lush, tropical world consisting of three large continents and chains of islands that jut from its shallow seas. All of the landmasses, apart from the frozen poles, are thick with vegetation and are inhabited by a wide variety of wildlife. Each of the world's many distinctive vistas is over-topped by the dull blue-gray sky.
This is a watery planet, with large areas of rainforest and a consistently humid atmosphere. The moisture combines with the high temperatures and the planet's rapid rotation to create frequent chaotic winds and periods of intense storms. Navigating through the upper atmosphere can be a difficult task. During the worst periods, landing safely may be impossible for even experienced pilots.
Because of the fertile soil, abundant rainfall, and the extra sunlight provided by Ylesia's ten hour days, plantlife is very prolific. The planet's spectacular junges are thick with blue-green foliage and a colorful panoply of enormous flowering plants. The plains are carpeted by dense moss and grasses, and the world's many swamps boast a startling array of botanical growth. One fungus from these swampy areas, which thrives on fresh blood, must be continually combated by adventurous visitors. If left unchecked, it can spread over any living creature, completely overwhelming its bodily systems in a matter of days.
The only known animal species native to Ylesia is the reek, a herbivorous ungulate that dominates the open plains. Although they have few natural predators native to Ylesia, reeks are fierce and belligerent. However, it is quite possible to train and domesticate them, and their great strength and surprising agility make them highly valued property both on Ylesia and offworld. Reeks have also been spotted throughout Ylesia's jungles, and reek attacks are usually blamed for the many deaths that have occurred along their periphery. However, the jungles are home to many other dangerous indigenous species, and the planet's wilds are widely known as prime hunting grounds.
The planet's settlements are few and sparse despite its abundance of natural resources, and small mining towns dot its equatorial regions. Ylesia also boasts a thriving medical resources industry, and it is rumored that the production of illicit substances is a popular industry among some of its outlying districts.