Tarkids

Tarkids are a fictional species featured in the science fiction novel "Project Hail Mary" by Andy Weir. They are an extraterrestrial species encountered by the protagonist, Ryland Grace, during his mission to save Earth. Tarkids are described as large, bioluminescent creatures that inhabit the oceans of their home planet, Eidon. They are characterized by their complex social structures and advanced understanding of physics.

Physically, Tarkids possess multiple limbs and a unique method of communication that involves intricate patterns of light emitted from their bodies. They are intelligent and capable of abstract thought, having developed their own form of science and technology, particularly in the field of manipulating gravity and energy. Their society is deeply intertwined with the ecosystem of their planet, and they are portrayed as benevolent and cooperative beings.

The Tarkids play a crucial role in the narrative of "Project Hail Mary" by providing essential knowledge and assistance to Ryland Grace in his quest to combat the Astrophage, a microscopic organism threatening both Earth and Eidon. Their advanced understanding of the Astrophage and their willingness to collaborate with humans make them vital allies in the face of intergalactic crisis. The novel explores themes of interspecies cooperation and the universal drive for survival through the interaction between humans and Tarkids.