Koosalitids

Koosalitids are a fictional group of microorganisms featured in the animated television series Futurama. They are introduced in the episode "The Deep South". Koosalitids are depicted as microscopic beings that inhabit the bodies of larger organisms, in this case, the residents of the titular Deep South. Their primary characteristic is their ability to consume and process waste materials, essentially acting as internal purifiers.

In the context of the episode, the inhabitants of the Deep South rely on koosalitids for their survival, as they live in an environment with significant waste. The koosalitids are portrayed as essential to the ecosystem of this community. When the main characters of Futurama, particularly Fry, encounter koosalitids, they initially perceive them as a nuisance or a strange biological phenomenon. However, their true beneficial nature is eventually revealed.

The concept of koosalitids explores themes of symbiosis and the often unseen biological processes that can sustain life. While fictional, they serve as a humorous and imaginative representation of how organisms can coexist and benefit from each other, even at a microscopic level. The koosalitids themselves are not given individual personalities but are treated as a collective biological entity. Their existence highlights the creative and often biologically inspired world-building present in Futurama.