Sudrakas

Sudrakas are a fictional species featured in the science fiction novel "Project Hail Mary" by Andy Weir. They are an alien race encountered by the protagonist, Ryland Grace, during his mission to save Earth. Sudrakas are described as large, six-limbed, crustacean-like creatures. Their bodies are covered in a tough exoskeleton, and they possess multiple eyes adapted to low-light conditions.

Communication with the Sudrakas proves challenging due to their vastly different biology and sensory perception. They primarily communicate through intricate patterns of bioluminescence and pheromones, making direct verbal understanding impossible for humans. Despite these differences, the Sudrakas are depicted as intelligent and technologically advanced. Their civilization has developed sophisticated methods for interstellar travel and energy generation, which are crucial to the plot of "Project Hail Mary."

The Sudrakas inhabit a star system located far from Earth's solar system. Their home planet is characterized by an atmosphere and environmental conditions that are toxic to humans, necessitating specialized suits and habitats for any interaction. A key aspect of their role in the story is their shared vulnerability to the same extraterrestrial threat that endangers Earth, leading to an unlikely alliance between the two species. Their scientific understanding and unique physiology are vital in finding a solution to this universal crisis.