The Swamps of Crinia are home to a diverse and unique ecosystem, consisting of a wide variety of plants and animals that have adapted to the toxic environment. The swamp is home to numerous species of venomous snakes and other reptiles, as well as large amphibians such as giant toads and poison dart frogs. The plants that grow in the swamp are also highly toxic, and include a number of carnivorous species that use poison to incapacitate their prey. Additionally, the swamp is home to a number of dangerous predators, such as basilisks and other large beasts, that have developed resistance to poison and thrive in the toxic environment. Overall, the wildlife of the swamp is highly adapted to the poison, and poses a significant danger to those who venture into the region.
North of Crinia and south of the Principe Peaks lay the Swamps of Crinia. This warm and damp wetland is generally avoided by travellers, but economically valuable to Crinia due to the harvest of its mushrooms, fibers, dyes, honey, and resin.