Bygien
Bygien is a fictional species featured in the science fiction novel "Project Hail Mary" by Andy Weir. They are an intelligent, sapient extraterrestrial life form encountered by the protagonist, Ryland Grace. The Bygien are depicted as large, quadrupedal beings with a segmented body structure, reminiscent of insects, but with a more advanced and alien physiology. Their biology is fundamentally different from terrestrial life, notably their reliance on a different form of energy metabolism that allows them to thrive in environments that would be lethal to humans.
The Bygien communicate through a complex system of clicks and vibrations, which Ryland Grace eventually learns